ok, DL, I think you're suffering my same problem
It seems there're two kinds of revelators. The newest ones works great with nvidia drivers, the olders won't work. They will work for a while, stop working, and work as "in flashes".
The only thing I could do to avoid buying a new pair was registering a driver for them called VrcaddyXP. You can find info about it at their site,
http://www.vrcaddy.com
Maybe where you live glasses will be cheaper than buying that program, but here in spain you have to order them from somewhere else (here it seems they're not selling fine, so nobody have them), and the cheapest pair glasses use to cost about 70-80 euros, included shipping&handling costs
.:: AMD Athlon XP 1700+ :: 512MB SDRAM :: Windows XP SP1 :: shappire ATI radeon 9600 PRO :: Soundblaster Live Player 5.1 :: Directx 9.0 :: (Always latest drivers for everything) ::.