When invoking JNLP button on
http://hudson.gotdns.com/wiki/display/JENKINS/Meet+Hudson invocation fails.

The Hudson Console window shows:

[Winstone 2009/01/14 12:49:55] - Beginning extraction from war file
[Winstone 2009/01/14 12:49:55] - Container startup failed

winstone.WinstoneException: The warfile supplied is unavailable or invalid
(C:\Documents and Settings\tra\Desktop)
at winstone.HostConfiguration.getWebRoot(HostConfiguration.java:214)
at winstone.HostConfiguration.<init>(HostConfiguration.java:73)
at winstone.HostGroup.initHost(HostGroup.java:85)
at winstone.HostGroup.<init>(HostGroup.java:45)
at winstone.Launcher.<init>(Launcher.java:196)
at winstone.Launcher.main(Launcher.java:391)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at Main.main(Main.java:70)
at JNLPMain.main(JNLPMain.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

where "tra" is my login.