Help needed with xserver

[wix@mgssub.com]

Greetings;

When I try to start gnome I get messages:

(WW) RADEON: No matching device section for instance (Busid PCI:1:0:1) found
...
drmOpenDevice: node name is /dev/dri/card0
": open result is -1 (No such device or address)
(same msg repeated)
": open failed

and my desktop doesn't start.

I start gnome from a console session with the command

   startx -- :0

Here is my xorg.conf file

    # xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
    Identifier    "Generic Keyboard"
    Driver        "kbd"
    Option        "XkbRules"    "xorg"
    Option        "XkbModel"    "pc104"
    Option        "XkbLayout"    "us"
EndSection

Section "InputDevice"
    Identifier    "Configured Mouse"
    Driver        "mouse"
EndSection

Section "Device"
    Identifier    "Configured Video Device"
EndSection

Section "Monitor"
    Identifier    "Configured Monitor"
EndSection

Section "Screen"
    Identifier    "Default Screen"
    Monitor        "Configured Monitor"
EndSection

I have tried reinstalling, reconfiguring, and other things to no avail.

Any help appreciated!

TIA!
Dennis