screen resolution + x windows

[Gregory L. Magnusson]

Hello,
I have just installed the kde x-windows system, and my screen resolution 
seems to be locked at 640x480.
I have multiple modes in my xorg.conf file
Modes "800x600" "1400x1200" "1024x768" but I cannot change the 
resolution. Where are the settings for this. Within KDE, the only 
options are 640x480 and 320x240.

How do I change the x-windows screen resolution?

Greg Magnusson
[EMAIL PROTECTED]