KDM not allowing root to access the default screen for x-apps

[Joseph Jones <joe@bumpycarrot.cjb.net>]

KDM wont allow me to use Gnome-Apt because it wont allow root access to 
the default screen. I am logged in as a regular user, open a terminal, 
su into root, try and load gnome-apt, but it wont allow root access to 
the screen. This only happens when I use KDM, GDM does not have this 
problem.

Any suggestions?

Joe