GDM refuses access from X-Terminal

Hi,

I'm running a X-Terminal, which connects to my server (running the Gnome
Display Manager GDM) via "X -query". Since the last debian update (on both
machines), the GDM has a strange behaviour.

When both machines are fresh bootet, the GDM refuses the connection from the
X-Terminal (you can see it in the log). The X-Server starts and stop
immediately. Trying a second time, results the same. But when I reboot the
X-Terminal and after this trying another time the connection to the GDM, it
works. I get a login prompt immediately.

Any ideas? I append my GDM configuration and the log.

Greatings, Michi;

/etc/gdm/gdm.conf:

[daemon]
RemoteGreeter=/usr/lib/gdm/gdmgreeter
TimedLoginDelay=5

[security]
DisallowTCP=false

[xdmcp]
Enable=true

[gui]
AllowGtkThemeChange=false

[greeter]
DefaultWelcome=false
Welcome=
DefaultRemoteWelcome=false
RemoteWelcome=:-)
SoundOnLogin=false
ConfigAvailable=false
ChooserButton=false
GraphicalThemeRand=false
GraphicalTheme=linsta
IncludeAll=false
Exclude=nobody,michin

[chooser]

[debug]
Enable=true

[servers]
0=inactive

[server-Standard]
name=Standard server
command=/usr/X11R6/bin/X -dpi 96 -audit 0
chooser=false
handled=true
flexible=true
priority=0

--------------------------

daemon.log after the GDM refused the connection (my server is called
michinguin and my X-Terminal tux):

Sep 7 19:20:59 michinguin gdm[5185]: gdm_socket_handler: Accepting new
connection fd 9
Sep 7 19:20:59 michinguin gdmgreeter[5326]: Sending command: 'VERSION'
Sep 7 19:20:59 michinguin gdm[5185]: Handling user message: 'VERSION'
Sep 7 19:20:59 michinguin gdmgreeter[5326]: Got response: 'GDM
2.14.5'
Sep 7 19:20:59 michinguin gdmgreeter[5326]: Sending command:
'GET_CONFIG
greeter/RemoteWelcome[C]'
Sep 7 19:20:59 michinguin gdm[5185]: Handling user message:
'GET_CONFIG
greeter/RemoteWelcome[C]'
Sep 7 19:20:59 michinguin gdm[5185]: Error returning config key
greeter/RemoteWelcome[C]
Sep 7 19:20:59 michinguin gdmgreeter[5326]: Got response: 'ERROR 50
Unsupported key <greeter/RemoteWelcome[C]>'
Sep 7 19:20:59 michinguin gdmgreeter[5326]: Sending command: 'CLOSE'
Sep 7 19:20:59 michinguin gdm[5185]: Handling user message: 'CLOSE'
Sep 7 19:20:59 michinguin gdm[5320]: gdm_slave_wait_for_login: In loop
Sep 7 19:20:59 michinguin gdm[5320]: term_quit: Final cleanup
Sep 7 19:20:59 michinguin gdm[5320]: gdm_slave_quick_exit: Will kill
everything from the display
Sep 7 19:20:59 michinguin gdm[5320]: Running gdm_verify_cleanup and
pamh !=
NULL
Sep 7 19:20:59 michinguin gdm[5320]: gdm_slave_quick_exit: Killed
everything from the display
Sep 7 19:20:59 michinguin gdm[5185]: mainloop_sig_callback: Got signal
17
Sep 7 19:20:59 michinguin gdm[5185]: gdm_cleanup_children: child 5320
returned 65
Sep 7 19:20:59 michinguin gdm[5185]: gdm_child_action: In remanage
Sep 7 19:20:59 michinguin gdm[5185]: gdm_display_unmanage: Stopping
tux:0
(slave pid: 0)
Sep 7 19:20:59 michinguin gdm[5185]: gdm_display_dispose: Disposing
tux:0
Sep 7 19:20:59 michinguin gdm[5185]: gdm_display_unmanage: Display
stopped