I have a GeForce 7900GS with a Gateway FPD 1975w hooked up for a desktop monitor. Some months ago I added a Sony Bravia flat screen to my office wall so I could run DVD's in my computer and watch them on the TV. I was able to run both screens simultaneously and things were working great. I now have a problem running the DVD's and watching them on the Sony. When I move the Windows media window from the desktop to the wall tv, the dvd increases in playing speed and either plays real fast or goes black and won't play at all. I don't know what I did to mess things up. Can anyone help?