Strange xauth problem

I stumbled into this weird problem, wondering if anyone can help me.
I put my local user account into the wheel group and ran visudo to 
enable wheel group to run commands with root privilidges. Running 
commands from terminal (xterm, konsole or gnome-terminal), except those 
requiring X or GUI works fine. For those that didn't (lets say for 
example I ran
Code:

sudo system-config-network

), they gave out this message:
Code:

[jafar@jafar ~]$ sudo system-config-network Xlib: connection to ":0.0" 
refused by server Xlib: Invalid MIT-MAGIC-COOKIE-1 key ERROR: Unable to 
initialize graphical environment. Most likely cause of failure is that 
the tool was not run using a graphical environment. Please either start 
your graphical user interface or set your DISPLAY variable.



And this is what
Code:

tail -f /var/log/Xorg.0.log

shows:

Code:

AUDIT: Sat May 7 00:54:23 2005: 9718 X: client 20 rejected from local 
host Auth name: MIT-MAGIC-COOKIE-1 ID: -1 AUDIT: Sat May 7 00:54:24 
2005: 9718 X: client 20 rejected from local host Auth name: 
MIT-MAGIC-COOKIE-1 ID: -1



I have tried copying .Xauthority from root to my local account, but 
still no go.