ATI Radeon Drivers problem

I own a Radeon 9600 pro video card. I downloaded a driver from one of the SuSE ftp sites, and got it to work fairly easily. 3D works great, glxgears shows a lot of fps. :-) However, the problem is that, when I kill the X server for whatever reason, the computer just locks up. When I restore the original xorg.conf, everything works great, and killing the X server does not lock up the computer. Am I the only one with this problem? Has anyone else had similar experiences?