gdm2setup not launching on debian squeeze

The application is not launching on Debian Squeeze.

ndlarsen@slave:~$ gksudo gdm2setup
Error: No section: 'daemon'
Error: No section: 'daemon'
Error: No section: 'daemon'
on_showloginscreen_radiobutton_toggled, value: True

(gksudo:28967): GLib-CRITICAL **: g_str_has_prefix: assertion `str != NULL' failed

ndlarsen@slave:~$ gksu gdm2setup
/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py:291: GtkWarning: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
  self.builder.add_from_file(os.path.join(whereami, "gdm2setup.ui"))
sudo: unknown user: gdm
sudo: unknown user: gdm
Error: No section: 'daemon'
sudo: unknown user: gdm
Error: No section: 'daemon'
Error: No section: 'daemon'
on_showloginscreen_radiobutton_toggled, value: True
Traceback (most recent call last):
  File "/usr/bin/gdm2setup", line 46, in <module>
    app = GDM2Setup()
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py", line 326, in __init__
    self.on_showloginscreen_radiobutton_toggled(self.showloginscreen_radiobutton)
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py", line 64, in on_showloginscreen_radiobutton_toggled
    self.theme.SetAutoLogin(False)
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2gconf.py", line 91, in SetAutoLogin
    with open(self.GDMCONF_FILE, 'wb') as configfile:
IOError: [Errno 2] No such file or directory: u'/etc/gdm/custom.conf'

ndlarsen@slave:~$ sudo gdm2setup
/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py:291: GtkWarning: GtkSpinButton: setting an adjustment with non-zero page size is deprecated
  self.builder.add_from_file(os.path.join(whereami, "gdm2setup.ui"))
sudo: unknown user: gdm
sudo: unknown user: gdm
Error: No section: 'daemon'
sudo: unknown user: gdm
Error: No section: 'daemon'
Error: No section: 'daemon'
on_showloginscreen_radiobutton_toggled, value: True
Traceback (most recent call last):
  File "/usr/bin/gdm2setup", line 46, in <module>
    app = GDM2Setup()
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py", line 326, in __init__
    self.on_showloginscreen_radiobutton_toggled(self.showloginscreen_radiobutton)
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2setup.py", line 64, in on_showloginscreen_radiobutton_toggled
    self.theme.SetAutoLogin(False)
  File "/usr/lib/pymodules/python2.6/gdm2/gdm2gconf.py", line 91, in SetAutoLogin
    with open(self.GDMCONF_FILE, 'wb') as configfile:
IOError: [Errno 2] No such file or directory: u'/etc/gdm/custom.conf'