screen out range below 60 hz starting media center

When I try to start the Media Center in Vista Beta 2 (5384.4 German) then my Screen tells me, that it is out of Range (49.8 Hz) which is odd, because in the Displaysettings if setted it to 60 Hz. It only happens when I start the Media Center, and switches back to 60 Hz when I exit the Media Center (by pressing Alt-F4) The most oddest thing is that when I press the Windows Key on my Keyboard, the Screen switches back to 60 Hz, and in the Background I can see the Media Center Setup running, I also can select things on it, and klick the Buttons, but as soon as I've klicked the Media Center ore one of its Options or Buttons, the Creen goes out of range again. I've not found any place or hint what to change, to keep Media Center to switch below 60 Hz.
I have a Geforce 6800 GTX with the latest NVidia Forceware drivers for Vista Beta 2 The Screen is a Acer AL718 LCD (installed as Super-VGA 1280x1024)
Please help, and ask, if I've forgotten to mention something.
I eager to try the new Media Center...
Raindancer@nobrain.ch

I had a similar problem. For me it was because the monitor driver was for a non generic pnp monitor. Once I changed it for the correct flat panel driver, it worked OK.
Stuart
"Peter Zürcher" wrote:

When I try to start the Media Center in Vista Beta 2 (5384.4 German) then my Screen tells me, that it is out of Range (49.8 Hz) which is odd, because in the Displaysettings if setted it to 60 Hz. It only happens when I start the Media Center, and switches back to 60 Hz when I exit the Media Center (by pressing Alt-F4) The most oddest thing is that when I press the Windows Key on my Keyboard, the Screen switches back to 60 Hz, and in the Background I can see the Media Center Setup running, I also can select things on it, and klick the Buttons, but as soon as I've klicked the Media Center ore one of its Options or Buttons, the Creen goes out of range again. I've not found any place or hint what to change, to keep Media Center to switch below 60 Hz.
I have a Geforce 6800 GTX with the latest NVidia Forceware drivers for Vista Beta 2 The Screen is a Acer AL718 LCD (installed as Super-VGA 1280x1024)
Please help, and ask, if I've forgotten to mention something.
I eager to try the new Media Center...
Raindancer@nobrain.ch