well the ati 1900 is kind of an old card it may not support the game. also how are you running it? the game may be trying to look for directx10 which is why its not working. see if you can tell it to manually run it under directx9. but if its not the driver, then im going to say your video cards to old. the specs say it should run but that dont mean anything. recomended to get full graphics is at least a nvidia 8800 GTS or compatible card. i have a friend who maxed the game graphics out with two 8600s in sli, but thats with some serious tweaking. that game is a serious performance hog.