vnc, gdm & root access

[Arik Raffael Funke <arik funke gmx de>]

Hi,

I am using Fedora Core 5 with vnc and gdm to gain root access to gnome. 
This works fine _except_ that some functions seem to be disabled. (I.e. 
Menu->System->Administration->Network or Security Level and Firewall, or 
 the Packet Installer)

If I login locally and enable instead the Remote Desktop function for 
the user root and connect then via vnc, I have full control.

I suppose that somehow gdm disables some functions for users logged in 
remotely, despite me having explicitly allowed remote administrator 
logins. (i.e. it does not show the button to shut down the system 
either...) Same goes if I login remotely as non-root user and 
authenticate myself then via Menu->System->Administration->Root 
Password. I am asked for the password and it shows the authenticated 
icon in the menu on the right, but the functions are still disabled.

How to I allow full remote administrator access to a machine? Any hints 
would be appreciated.

Best regards,
Arik