kde won't start on x86_64

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http://forums.fedoraforum.org – I recently installed Fedora 11 64-bit on an intel x86-64 system, and I can't seem to get KDE to start. I installed Xorg and KDE from the repos, and I can start the X server just fine, but I don't get anything out of KDE. After logging in as root and running startx, I get a dark screen. It usually has a few random red pixels at the top, and several seconds later it usually puts a punch of horizontal white bars across the screen, with random red and green pixels in between. I have specified the horizontal sync rate and vertical refresh rate of my monitor in xorg.conf. At this point I'm just flat out of ideas to try.:confused: Any help is greatly appreciated. (HowTos)