tom clancy's conviction

Hello guys. I get blue screen error atikmpag.sys when i playing Tom Clancy Conviction the game. I have Win 7 Ultimate Sp1 32 bit , video card : Ati Radeon HD 3800series ; 2gbram ; dual core proccesor e6750 ; motherboard Asrock P45X3 Deluxe I tryed some many "fixes" , like : Uninstall - Install...