Problem to start domino server

Hallo
 
my domino R6 server is running since 4 weeks.
Now i have problems to start the the domino server. It seem that he try
to start in setupmodus. But he is still configured.
 
The message shows like this 
 
/opt/lotus/bin/server
 
./java -ss512k -Xoss5M -cp jhall.jar:cfgdomserver.jar:Notes.jar
lotus.domino.setup.WizardManagerDomino -data /notesdata
Please edit your shell's DISPLAY environment variable to reflect an
unlocked terminal that you would like to launch the Domino Setup Program
on.
*Warning all runtime debug info will be logged to
/notesdata/setuplog.txt
 
Where can I switch off the setupmodus to start the server normal?
 
Kindly
 
Andreas