Exhibit 10.11
                                                                EXECUTION COPY

                          DLJ Merchant Banking II, Inc.
                                11 Madison Avenue
                               New York, NY 10010

                                  July 20, 2004

PRIVATE AND CONFIDENTIAL

AHC I Acquisition Corp.
c/o DLJ Merchant Banking II, Inc.
11 Madison Avenue
New York, NY 10010

Ladies and Gentlemen:

Reference  is hereby  made to that  certain  Letter  Agreement  Assignment  (the
"Assignment"),  dated April 27, 2004, from Credit Suisse First Boston LLC to DLJ
Merchant Banking II, Inc. ("DLJMB") of the Letter Agreement,  dated December 12,
1997 (the "Agreement"),  between Credit Suisse First Boston LLC (as successor to
the interests of Donaldson,  Lufkin & Jenrette Securities  Corporation under the
Agreement) ("CSFB") and AHC I Acquisition Corp. (the "Company").

Pursuant to the terms of the Agreement and the  Assignment,  the Company  hereby
agrees to pay DLJMB a one-time fee (the "Financial Advisory Fee") of two million
dollars  ($2,000,000) in consideration for financial  advisory services rendered
to the Company by DLJMB in connection with the  consummation of the transactions
contemplated by the Merger  Agreement (the "Merger  Agreement"),  dated July 20,
2004, by and among the Company,  AHC Merger,  Inc. and Fusion  Acquisition  LLC.
Payment of such  Financial  Advisory  Fee shall be made by the  Company to DLJMB
immediately upon the closing under the Merger Agreement.

                                               Very truly yours,

                                               DLJ MERCHANT BANKING II, INC.



                                               By: /s/ Michael Isikow
                                                   -------------------------
                                                   Name:  Michael Isikow
                                                   Title: Principal





ACCEPTED AND AGREED

AHC I ACQUISITION CORP.


By: /s/ Kenneth A. Budde
    --------------------------------
     Name:  Kenneth A. Budde
     Title: Chief Financial Officer
     Date:  July 20, 2004