name your prefs to 'oldprefs' and restart the computer, maya will make a new default set of prefs.., its worked for me occasionally in your situation.., if it doesnt you can delete (when maya is off) the new prefs and rename the old ones.., and.., sorry thats my only suggestion atm.

maybe reinstall the latest driver for your G_card

you might also try turning the reference around to show the other side.., you might have show both sides off