Think there is a bug in latest Detnator drivers for Nvidia. check it

all works well with my card on a clean boot system. however when trying to use Aniscoptic filtering with Anti-alising, it is quite apparent that the Aniscoptic filtering prevails and COMPLETELY cancels out the Anti-alising!!!! I uninstalled the driver and re-install many times with no change. Am I the only one that is having this problem. I would love to have Anti-alising and 8x Aniscoptic filtering enabled at the same time!! Man that would look sweet. thanks

Have you tried to use a different driver and see if the same problem occus still? Also, if you have multiple tweak programs running, sometimes times the values can get crossed if you bounce back and forth a lot.