ATI 200m appears to install, but X won't start?

I upgraded my ATI driver using the ATI sticky page for reference, and it appears everything worked O.K., but now I can’t get a GUI. If I restart or “init 5” I’m back at a console.

The weird thing is that after doing a “sax2 -r -m 0=fglrx” command, the sax2 config screen comes up (mouse works, resolution changes, etc.), which means I should be able to run an X session, but after I save the config it takes me back to a command prompt.

Does anybody know any tricks to get back to a GUI?