Server not starting when using screen "signal: SIGHUP [hangup]"

[trulli]

just installed Fedora core 2 x86_64 on my new server (dual opteron 242)

i configured a ut2k4server on it.. when i start these servers without a screen session everything is ok.. but when i add screen -S <name> to the start script, the server wants to start and while starting it puts out the following:

issing Class Class Editor.TransBuffer
Browse: CTF-Drunklet-PRO?game=XGame.xCTFGame?mutator=XGame.MutInstaGib,XGame.MutNoAdrenaline
ProcMesh 0 shared verts.
Collecting garbage
Purging garbage
Garbage: objects: 35791->35782; refs: 400143
Game class is 'xCTFGame'
Bringing Level CTF-Drunklet-PRO.myLevel up for play (40) appSeconds: 9.165968...
Loading Admins & Groups
Kick and Ban Privileges Loaded
Maps & Game Privileges Loaded
Admins & Groups Management Loaded
Extra Privileges Loaded
Mutators XGame.MutInstaGib,XGame.MutNoAdrenaline
GameInfo::InitGame : bEnableStatLogging False
Spawning Anti Bypass Tool
UdpServerQuery(crt): Port 7787 successfully bound.
Resolving master0.gamespy.com...
MasterServerUplink: MasterServerGameStats not found - stats uploading disabled.
Signal: SIGHUP [hangup]
Requesting Exit.
appRequestExit(0)
Resolving ut2004master1.epicgames.com...
Loading Available Maps
Loading Game Types
Mutator exported successfully: SpiderSteroids.MutSpiderSteroidReplacer
Weapon exported successfully: SpiderSteroids.SpiderSteroidLayer
XWebAdmin.UTServerAdmin Initialized on port 7780
Success - 0 error(s), 1 warning(s)

when i start the server without a screen session in the script it works fine.

would b nice if some1 knows why it's exiting with:

Signal: SIGHUP [hangup]
Requesting Exit.
appRequestExit(0)

never seen it before