LinuxQuestions.org - [Ubuntu 9.10]Java error when starting scripts.

Hello there,and Merry Christmas.
I have a serious problem with java and i can't run my gameserver.

my java version is this

java version "1.6.0_15"
Java(TM) SE Runtime Environment (build 1.6.0_15-b03)
Java HotSpot(TM) 64-Bit Server VM (build 14.1-b02, mixed mode)

And when i am trying to run my gameserver scripts i get this error.

root:~# /home/l2jserver/login # ./L2JConfig.sh
Exception in thread "AWT-EventQueue-0" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at java.awt.Window.<init>(Window.java:431)
at java.awt.Frame.<init>(Frame.java:403)
at java.awt.Frame.<init>(Frame.java:368)
at javax.swing.JFrame.<init>(JFrame.java:163)
at net.sf.l2j.configurator.ConfigUserInterface.<init>(ConfigUserInterface.java:120)
at net.sf.l2j.configurator.ConfigUserInterface$1.run(ConfigUserInterface.java:112)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

This is not my desktop computer but my remote server.
I would be really gratefull if someone can help me to resolve this issue.Thank you and again Merry Christmas