PLEASE, PLEASE, PLEASE HELP!!! XPS screen goes completely black when Windows loads

The Radeon 9700 mobility driver will not let me choose the built-in LCD monitor of my Inspiron XPS as the primary monitor in the ATI control panel. It has set the primary up as a CRT monitor with no other monitors selectable,(Even though you can see the pictures of the other possible selections, you can't push the on-screen button that selects them and there is also a red X on the pics of the cables next to each selection). So when Windows loads, the screen goes black but when I connect a external CRT monitor I can see the desktop on the CRT screen. I have reinstalled the drivers that shipped with the XPS and downloaded and installed the newest drivers from this site but the drivers seem to be the problem. If I got to device manager and disable the ATI driver, the LCD screen works, but I won't be able to use the ATI control panel because the driver is disabled. ANY ideas on how to resolve this HUGE problem will be VERY helpful and appreciated. THX