ok, well im not sure exactly what the problem is, but try uninstalling the driver and reinstalling it for the card, or maybe downloading an updated one if possible.
and when u say cant open the properties, do you mean the menu for the card through the display settings? or the Nview desktop Manager?
the desktop manager should be refreshed/reinstalled as well if you uninstall the driver and reinstall it.
hope it helps, and anyone are welcome to correct me if i am wrong, , cause i would like to know what causes this error as well
P4 2.5 Ghz/socket 478/400FSB/512L2
512 megs PC800 Rambus
ABIT TH7II-Raid mobo
128MB Nvidia FX 5200 Home Theatre w/TV out and Remote
80 Gig Western Digital/8mb Cache/7200 RPM\'s
20 gig Fujitsu/2mb Cache/5400 RPM\'s