xwindows

[Beavis]

i have been playing with the xf86config but can't seem to get everything to work   the best i can do is get to a grey scrren with an x in the middle.  it stays at that screen for about 5 sec and then  goes back to the normal command line screen   i looks like it almosts wants to load, then halts.   the last line reads: waiting for x server to shut down     any ideas what could cause this and more importantly, how to fi it?   thankx in advance beavis