gdm: please help me!!!

[Riccardo Persichetti <riccardo persichetti mo nettuno it>]

I've got sources of gnome, compiled, installed and everything is ok.
I'm running Debian 2.1.

But gdm doesn't work: when i launch it, it starts the X server, set the root
color, wait a few seconds and then kill X server.
It does so in a never-ending loop.

To help you to help me :-)
here are two files:

syslog
------
Apr  1 18:03:10 ricpersi gdm[187]: gdm_config_parse: Invalid server line in
config file. Ignoring!
Apr  1 18:03:10 ricpersi gdm[188]: gdm_main: Here we go...
Apr  1 18:03:10 ricpersi gdm[188]: gdm_local_servers_start: Starting :0
Apr  1 18:03:10 ricpersi gdm[188]: gdm_server_start: :0
Apr  1 18:03:10 ricpersi gdm[188]: gdm_auth_secure_display: Securing :0
Apr  1 18:03:10 ricpersi gdm[188]: gdm_auth_secure_display: Could not
unlink /opt/gnome/var/gdm/:0.xauth file: No such file or directory
Apr  1 18:03:10 ricpersi gdm[190]: gdm_server_start: '/usr/bin/X11/X -auth
/opt/gnome/var/gdm/:0.xauth :0'
Apr  1 18:03:11 ricpersi gdm[188]: gdm_server_usr1_handler: Starting
display:0!
Apr  1 18:03:11 ricpersi gdm[188]: gdm_slave_start: Opening display :0
Apr  1 18:03:15 ricpersi gdm[188]: gdm_display_manage: Managing :0
Apr  1 18:03:15 ricpersi gdm[188]: gdm_display_manage: Forked slave: 192... 
Apr  1 18:03:15 ricpersi gdm[192]: gdm_slave_start: Starting slave process
for:0
Apr  1 18:03:15 ricpersi gdm[192]: gdm_slave_start: Opening display :0
Apr  1 18:03:15 ricpersi gdm[192]: gdm_slave_greeter: Running greeter on :0
Apr  1 18:04:14 ricpersi gdm[192]: gdm_slave_greeter: Greeter on pid 198
Apr  1 18:04:14 ricpersi gdm[188]: gdm_child_handler: child 190 returned 0
Apr  1 18:04:14 ricpersi gdm[188]: gdm_child_action: :0
Apr  1 18:04:14 ricpersi gdm[188]: gdm_server_start: :0
Apr  1 18:04:14 ricpersi gdm[188]: gdm_auth_secure_display: Securing :0
Apr  1 18:04:14 ricpersi gdm[200]: gdm_server_start: '/usr/bin/X11/X -auth
/opt/gnome/var/gdm/:0.xauth :0'
Apr  1 18:04:14 ricpersi gdm[188]: gdm_server_usr1_handler: Starting
display:0!

gdm.conf
--------
[appearance]
Browser=1
Completion=1
Logo=1
LogoImage=/opt/gnome/share/pixmaps/gnome-logo-large.png
NoFaceImage=/opt/gnome/share/pixmaps/nophoto.png
GlobalImageDir=
Quiver=1
Iconify=1
IconFile=/opt/gnome/share/pixmaps/gdm.xpm
Gtkrc=

[system]
ShutdownMenu=1
SuspendCommand=
UserFileCutoffSize=65536
UserIconMaxWidth=128
UserIconMaxHeight=128
DefaultPath=/opt/gnome/bin:/usr/local/bin:/usr/bin/X11:/usr/bin:/bin

[messages]
Welcome=Welcome to %h

[daemon]
SessionDir=/opt/gnome/etc/gdm/Sessions
PidFile=/var/run/gdm.pid
Greeter=/opt/gnome/bin/gdmgreeter
Chooser=/opt/gnome/bin/gdmchooser
User=gdm
Group=gdm
DisplayInitDir=/opt/gnome/etc/gdm/Init
KillInitClients=1
PreSessionScriptDir=/opt/gnome/etc/gdm/PreSession
PostSessionScriptDir=/opt/gnome/etc/gdm/PostSession
AuthDir=/opt/gnome/var/gdm
LogDir=/opt/gnome/var/gdm

[servers]
0=/usr/bin/X11/X
#1=/usr/bin/X11/X

[xdmcp]
Enable=0
MaxLoadAvg=10
MaxPending=4
MaxManageWait=20
MaxSessions=4
Port=177

[chooser]
ImageDir=
DefaultImage=/opt/gnome/share/pixmaps/nohost.png

[debug]
Enable=1


Please I really need your help, i've tried all the way i could but I FAILED!!!

Thanks

  Riccardo