MACROMEDIA FLASH COMMUNICATION SERVER LICENSE AGREEMENT

This Amendment No. 6 (“Amendment 6”) to the Macromedia Flash Communication Server License Agreement by and between VitalStream, Inc. (“Licensee”), a Delaware corporaation with its principal place of business at One Jenner, Suite 100, Irvine, California 92618 and Adobe Systems Incorporated, a Delaware corporation with its principal place of business at 345 Park Avenue, San Jose, CA 95110-2704 (“Adobe”), is effective as of December 1, 2006 (the “Amendment 6 Effective Date”).

WHEREAS, the parties entered into the Macromedia Flash Communication Server License Agreement dated as of November 17, 2003 (the “Original Agreement”), as amended by (a) Amendment No. 1 to the Original Agreement dated as of March 2004 (“Amendment 1”), (b) Amendment No. 2 to the Original Agreement dated as of March 2004 (“Amendment 2”), (c) Amendment No. 3 to the Original Agreement dated as of August 6, 2004 (“Amendment 3”), (d) Amendment No. 4 to the Original Agreement dated as of March 1, 2005 (“Amendment “), and (e) Amendment No. 5 to the Original Agreement dated as of December 30, 2005. All of the foregoing amendments together with the Original Agreement, shall be referred to herein as the “Agreement”; and

WHEREAS, the parties desire to expand their business relationship;

NOW, THEREFORE, in consideration of the foregoing and other valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties agree as follows:

Except as expressly provided herein, all capitalized terms used in this Amendment 6 but not otherwise defined herein shall have the meanings given such terms in the Agreement and, unless otherwise specified, references to Sections refer to Sections of the Agreement.

“A. License Fees. Starting with the Amendment 6 Effective Date and at each annual anniversary of the Amendment 6 Effective Date thereafter during the Term, Licensee shall pay Adobe an annual, non-cancelable and non-refundable prepayment of the license fees payable by Licensee for use of the Service (each, a “Prepayment Fee”). Each annual Prepayment Fee shall be applied, on a monthly basis, against the license fees payable by Licensee for use of the Service during the applicable month, which license fees consist of either (i) the Customer License Fee, or (ii) the Minimum Transfer Fee (each as defined below), whichever is greater during such month, measured on a per-Customer basis. Except for the amount of Carryover Amount (as defined below), to which the following shall not apply, the Prepayment Fee actually paid by Licensee to Adobe shall determine the price point for the Customer License Fee and the Minimum Transfer Fee payable during the applicable twelve-month period to which the Prepayment Fee applies, as such price points are set out in the table below.

Either or both of the Customer License Fee and/or the Minimum Transfer Fee may be referred to herein as a “License Fee”.

B. Prepayment Fee . The Prepayment Fee (including, for avoidance of doubt, the Initial Prepayment Fee and any Additional Prepayment Fee) is non-cancelable and non-refundable, (except for refunds made pursuant to Section 7 of the Agreement, as amended by Section 5 hereof; if the Prepayment Fee and, if applicable, any Additional Prepayment Fee, having not been fully expended, then Licensee shall be entitled to receive a refund in the amount of that portion of the Prepayment Fee, and, if applicable, any Additional Prepayment Fee, that had not been expended as of the date of such termination, which refund payment shall be made by Adobe to Licensee within 30 days of the date of termination, and any portion of the refund not paid within such 30 days shall be subject to a late charge of 1.5% per month of the maximum rate allowed by applicable law, whichever is less,