Same here furbs with the same card, tried it with the new 280 drivers, the 266.58, and will try 275.33 next. I have tried both 'application controlled' for aa (with it off in CoD options) and still no joy. There is no difference whatsoever?
The files are most definitely there, I tried to reinstall them and got the 'files already present message' then just overwrote them again. Installed through the steam>steamapps>common etc pathway NOT the Documents 1C softclub etc path, is this what I'm doing wrong?
Also, I should be pressing the PAUSE/BREAK key in the corner of my keyboard to get it to trigger, right? Is there a visual kind of cue/sign that it has been triggered? Seems to do SFA for me.