Problem with Prince of Persia - The Sands Of Time

[mh00]

I'm having a very big problem with Prince of Persia: Sand of Times. When I play, everything in the game is in slow-motion. From the prince to the enviroment and the enemies.

When I start the game there's a pop-up which says:
"Your videocard « NVIDIA GeForce 6800 » is not supported.
This may result in enexected behaviours. Do you want to launch the game anyway?"
I'm not a computer genius, but I think that is were the problem is.

I remember that when I tried to play Prince of Persia: The Two Thrones around a year ago, I had the same problem and eventuelly just gave up trying to fix it.

I've tried tha patch from Ubisoft which is supposed to correct problems for Nvidia GeForce 6800 based videvards without success.

What should I do to solve this problem? I could play these games a couple of years ago without any problems and I know they work! Please help me!