Spiderman Web of Shadows white game screen when playing?

I have checked my system req. to the game and there where no problems.. I can run the game very well, without any other problem, but then I start the game and the game begins the screen goes white, but sometimes, or then pressing a certain key the game screen works fine (SO that I can see the game play), but after it goes white again? any one else with this problem? any solutions?Spiderman Web of Shadows white game screen when playing?
Do they have a help line you can call?