UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 -------------- SCHEDULE 13D (AMENDMENT NO. 3) UNDER THE SECURITIES EXCHANGE ACT OF 1934 CONCERTO SOFTWARE, INC. ------------------------------------------------------------------------------- (Name of Issuer) COMMON STOCK, PAR VALUE $0.10 PER SHARE ------------------------------------------------------------------------------- (Title of Class of Securities) 20602t106 ------------------------------------------------------------------------------- (CUSIP Number) Ernest Mysogland with a copy to: ISIS Capital Management, LLC 1465 Post Road East, 2d Floor George Y. Liu Westport, Connecticut 06880 Boies, Schiller & Flexner LLP Tel. No.: (203) 259-7387 333 Main St. Armonk, New York 10504 Tel. No.: (914) 749-8200 ------------------------------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) JANUARY 16, 2003 ------------------------------------------------------------------------------- (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this statement because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box: { } The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the act (however, see the Notes). SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON ISIS Capital Management, LLC I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 8,250 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 8,250 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,250 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON OO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Rodney Bienvenu I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 8,250 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 8,250 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,250 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Richard Rofe I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 8,250 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 8,250 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,250 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Ernest Mysogland I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 8,250 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 8,250 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,250 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Kevin Goodman I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 8,250 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 8,250 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 8,250 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) .1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Ramius Securities, LLC I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 219,470 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 219,470 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 219,470 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES { } ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 2% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON BD, OO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Ramius Capital Group, LLC I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 890,000 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 890,000 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IA, OO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON C4S & Co., LLC I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 890,000 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 890,000 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON OO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Ramius Advisors, LLC I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 228,623 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 228,623 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 228,623 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 2.1% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IA, OO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Peter A. Cohen I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 890,000 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 890,000 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Morgan B. Stark I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 890,000 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 890,000 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Thomas W. Strauss I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 890,000 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 890,000 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Jeffrey Solomon I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS NA ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION UNITED STATES ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 0 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 890,000 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 0 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 890,000 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 890,000 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 8% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON IN ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON RCG Ambrose Master Fund, Ltd. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 275,095 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 275,095 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 275,095 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 2.5% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON CO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON RCG Carpathia Master Fund, Ltd. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 166,812 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 166,812 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 166,812 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.5% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON CO ------------------------------------------------------------------------------- SCHEDULE 13D CUSIP No. 20602t106 ------------------- ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON Ramius Master Fund, Ltd. I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) {X} (b) { } ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 SOURCE OF FUNDS WC ------------------------------------------------------------------------------- 5 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) { } ------------------------------------------------------------------------------- 6 CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands ------------------------------------------------------------------------------- 7 SOLE VOTING POWER NUMBER OF SHARES 228,623 BENEFICIALLY -------------------------------------------- OWNED BY EACH 8 SHARED VOTING POWER REPORTING PERSON 0 WITH -------------------------------------------- 9 SOLE DISPOSITIVE POWER 228,623 -------------------------------------------- 10 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 228,623 ------------------------------------------------------------------------------- 12 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES {x} ------------------------------------------------------------------------------- 13 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 2% ------------------------------------------------------------------------------- 14 TYPE OF REPORTING PERSON CO ------------------------------------------------------------------------------- AMENDMENT TO SCHEDULE 13D The Schedule 13D relating to the Common Stock, par value $0.10 per share (the "Common Stock"), of Concerto Software, Inc., a Delaware corporation (the "Issuer"), having its principal executive offices at 6 Technology Park Drive, Westford, Massachusetts 01886, which was filed with the U.S. Securities and Exchange Commission on December 15, 2003, as amended by Amendment No. 1 to Schedule 13D, which was filed with the U.S. Securities and Exchange Commission on December 19, 2003, and as further amended by Amendment No. 2 to Schedule 13D, which was filed with the U.S. Securities and Exchange Commission on December 24, 2003, in each case by the Reporting Persons (as defined below) (collectively, the "Prior Schedule"), is hereby further amended to furnish additional information set forth herein. All capitalized terms not otherwise defined shall have the meanings ascribed to such terms in the Prior Schedule. This amendment is filed by the ISIS Group (as defined below). The "ISIS Group" or the "Reporting Persons" consist of ISIS Capital Management, LLC ("ISIS"), Rodney Bienvenu, Richard Rofe, Ernest Mysogland, Kevin Goodman, RCG Ambrose Master Fund, Ltd., RCG Carpathia Master Fund, Ltd., Ramius Master Fund, Ltd., Ramius Securities, LLC, Ramius Capital Group, LLC, Ramius Advisors, LLC, C4S & Co. LLC, Peter A. Cohen, Morgan B. Stark, Thomas W. Strauss and Jeffrey Solomon. ITEM 4. PURPOSE OF TRANSACTION Item 4 is hereby amended to add the following statement: Each of ISIS, Ramius Securities, LLC, Ramius Master Fund, Ltd., RCG Ambrose Master Fund, Ltd. and RCG Carpathia Master Fund, Ltd. have caused, through the shareholder of record through which its shares of Common Stock are held for its benefit (the "Shareholder of Record"), a written demand for appraisal rights for its shares of Common Stock to be sent on January 16, 2004 to the Issuer in respect of the proposed Merger of the Issuer with an indirect wholly owned subsidiary of Melita. Copies of the appraisal demand letters sent at the request of ISIS, Ramius Securities, LLC, Ramius Master Fund, Ltd., RCG Ambrose Master Fund, Ltd. and RCG Carpathia Master Fund, Ltd., by the Shareholder of Record, are attached hereto as Exhibits A through E and are incorporated herein by reference. Each of ISIS, Ramius Securities, LLC, Ramius Master Fund, Ltd., RCG Ambrose Master Fund, Ltd. and RCG Carpathia Master Fund, Ltd. reserves the right to request and cause the relevant Shareholder of Record to withdraw, under Section 262 of the Delaware General Corporation Law, its demand for appraisal of its shares of Common Stock at any time prior to, or within 60 days after, the effective time of the proposed Merger. ITEM 7. MATERIAL TO BE FILED AS EXHIBITS There is filed herewith, as Exhibits A through E, a copy of the appraisal demand letter sent at the request of each of ISIS, Ramius Securities, LLC, Ramius Master Fund, Ltd., RCG Ambrose Master Fund, Ltd. and RCG Carpathia Master Fund, Ltd., respectively. SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: January 20, 2004 ISIS CAPITAL MANAGEMENT, LLC By: /s/ Ernest Mysogland -------------------------- Name: Ernest Mysogland Title: Managing Member /s/ Ernest Mysogland --------------------- Ernest Mysogland, Individually and as attorney-in-fact for each of Rodney Bienvenu, Richard Rofe, and Kevin Goodman RAMIUS SECURITIES, LLC By: Ramius Capital Group, LLC Its: Managing Member By: C4S & Co., LLC Its: Managing Member By: /s/ Morgan B. Stark -------------------------- Name: Morgan B. Stark Title: Managing Member RAMIUS CAPITAL GROUP, LLC By: C4S & Co., LLC Its: Managing Member By: /s/ Morgan B. Stark -------------------------- Name: Morgan B. Stark Title: Managing Member C4S & Co., LLC By: /s/ Morgan B. Stark ------------------------------- Name: Morgan B. Stark Title: Managing Member RCG AMBROSE MASTER FUND, LTD. By: /s/ Morgan B. Stark ------------------------------- Name: Morgan B. Stark Title: Authorized Person RCG CARPATHIA MASTER FUND, LTD. By: /s/ Morgan B. Stark ------------------------------- Name: Morgan B. Stark Title: Authorized Person RAMIUS MASTER FUND, LTD. By: /s/ Morgan B. Stark ------------------------------- Name: Morgan B. Stark Title: Authorized Person /s/ Morgan B. Stark ------------------------------- Morgan B. Stark, Individually and as attorney-in-fact for each of Peter A. Cohen, Thomas W. Strauss and Jeffrey Solomon RAMIUS ADVISORS, LLC By: Ramius Capital Group, LLC Its: Managing Member By: C4S & Co., LLC Its: Managing Member By: /s/ Morgan B. Stark -------------------------- Name: Morgan B. Stark Title: Managing Member