You do have a screen section in your /etc/X11/XF86Config file, right? Here's my screen section.
Code:
Section "Screen"
Identifier "VGA"
Device "AOpen Geforce3 Ti200"
Monitor "Compaq MV520"
DefaultDepth 24
Subsection "Display"
Depth 8
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1024x768"
ViewPort 0 0
EndSubsection
EndSection
Depending on what you name your other stuff, change the Device and Monitor lines accordingly. Here's my server layout.
Code:
Section "ServerLayout"
Identifier "Pwnz4g3 Layout"
Screen "VGA"
InputDevice "M$ Wireless Intellimouse Explorer" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"
EndSection
Change the Input device things as neccesary, of course. If you've already done that, then I suppose I'm perplexed.