Nvidia-driver (or something else?)

Hi...I recently updated my nvidia-driver to the newest (162.18), and since then my framerates seems to have dropped alot. I'm getting 5-8 fps, maybe up to 15fps in high altitudes. I have:ASUS A8V-E SE motherboardAMD Athlon 64 X2 dual 4600+ processor3gb RAMNvidia Geforce 7900 GT/GTOrunning windows XP, and with almost only FsX and windows installed on the computer.I am running activeSky and radar contact, but it doesn't seem to do any difference for framerates though.I can't figure out how to get the old nvidia driver (to be honest I can't even remember which one I had before) But maybe thats not even the problem? or?thanks in advance-Lau