[blackops]

I just switched video cards from a nvidia mx420 to a redeon 9600xt and now i get Antioglxx.dll error after about starting the game 2x. It will make my computer restart. I enter Antioglxx.dll as search terms and somone was talking about a game and how they had to downgrade there drivers to a cat 6 driver and i tryed that and that didnt work please help me out thank you.
My system specs are
60gb
2.4ghz
256mb ram