No Input Signal

When I launch Crossfire my monitor goes blank and says No Input Signal. My desktop resolution is 1280x960 at 85Hz. I've tried every desktop resolution and refresh rate imaginable. This is the only game this has ever happend to me in. I play TF2 and QuakeLive regularly and I've had no problems. I've tried uninstalling and reinstalling, reinstalling and updating video drivers, etc. I tried running it on my LCD, same thing. Any help would be appreciated.