[CentOS] Vnc Problems

Hi

I have a Centos server running and have been vncing into it for a couple 
of months.  A while back I was admining another server thru it using 
firefox.  The browser crashed and several services crashed in Centos as 
well.  Ever since then I get the bottom menu in Gnome but none of the 
open programs show up in it.

So If I minimize a program it is gone, and I can't open it again from 
the desktop.  Does anyone have any suggestions on how I can fix this.

Thanks

Mace