10.2 catalyst wont open in xp sp3?

[g.costanza]

i installed a HD 4550 and included 9.? catalyst and drivers on my pc (amd64 3500+) running a fresh install of 32 bit xp home sp3 and everything was fine. I downloaded 10.2 cat. and driver and now catalyst wont open when I click on the button in my programs list. Any ideas?