Exhibit 10.55
AMENDMENT NO. 2 TO 2002 INCENTIVE STOCK OPTION PLAN
     The 2002 Incentive Stock Option Plan (the “Plan”) is hereby amended
effective as of May 19, 2006 (the “Effective Date”) with respect to all Options
granted pursuant to the Plan, including grants outstanding before the Effective
Date, as set forth below.

1.   The Plan is hereby amended by adding the following new paragraph:      
 16. EFFECT OF MERGER. Notwithstanding any other provision of the Plan, in the
event that the Company is merged (the “Merger”) into another company (the
“Merger Sub”) after a majority of the Company’s Common Stock has been purchased
by the parent of the Merger Sub through a tender offer, then all outstanding
stock options granted under this Plan, whether vested or unvested, will
terminate as of the close of the Merger in exchange for a cash payment equal to
the difference per option share of the per share value of the consideration to
be received by common stockholders in the Merger and the per share exercise
price for each option.