Help with X on Core 2 Test 2

[Kevin Johnson]

Hi-

I just decided to install Fedora Core 2 test 2 on one of my machines. 
The install went fine but afterwards I am having a problem.  

My issue is that if I leave the machine on overnight, when I get
up in the morning the display is locked.  Nothing is happening and it
will not respond to keyboard or mouse.  I can ssh into the machine from
another machine and I do not see anything that leaps out at me as
wrong.  

Any help would be appreciated as I am at my wits end.
Thanks
Kevin