EX-99.2 3 a2175797zex-99_2.txt EXHIBIT 99.2 EXHIBIT 2 --------- AGREEMENT AS TO JOINT FILING OF SCHEDULE 13G -------------------------------------------- Each of the undersigned hereby affirms that it is individually eligible to use Schedule 13G, and agrees that this Schedule 13G is filed on its behalf. Dated: February 13, 2007 CITIGROUP VENTURE CAPITAL EQUITY PARTNERS, L.P. By: CVC Partners, LLC Title: General Partner, Citigroup Venture Capital Equity Partners, L.P. By: Citigroup Venture Capital GP Holdings, Ltd. Title: Managing Member of CVC Partners, LLC By: /s/ Patricia A. Murphy --------------------------------- Name: Patricia A. Murphy Title: Vice President of Citigroup Venture Capital GP Holdings, Ltd. CVC PARTNERS, LLC By: Citigroup Venture Capital GP Holdings, Ltd. Title: Managing Member of CVC Partners, LLC By: /s/ Patricia A. Murphy --------------------------------- Name: Patricia A. Murphy Title: Vice President of Citigroup Venture Capital GP Holdings, Ltd. CITIGROUP VENTURE CAPITAL GP HOLDINGS, LTD. By: /s/ Patricia A. Murphy --------------------------------- Name: Patricia A. Murphy Title: Vice President COURT SQUARE CAPITAL LIMITED By: /s/ Patricia A. Murphy --------------------------------- Name: Patricia A. Murphy Title: Vice President CITICORP BANKING CORPORATION By: /s/ William H. Wolf --------------------------------- Name: William H. Wolf Title: Senior Vice President CITIGROUP INC. By: /s/ Riqueza V. Feaster --------------------------------- Name: Riqueza V. Feaster Title: Assistant Secretary