java.lang.reflect.InvocationTargetException

Hi I’m a newbie to Spark SVN + Eclipse 3.3 + Subversive. I followed all the steps mentioned in http://www.igniterealtime.org/community/docs/DOC-1040

When i run the program, i am getting the following error. Anyone help me how to debug this?

java.lang.reflect.InvocationTargetException

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 org.jivesoftware.launcher.Startup.start(Startup.java:83)

at org.jivesoftware.launcher.Startup.main(Startup.java:33)

Caused by: java.lang.Error: Unresolved compilation problems:

GSSAPIConfiguration cannot be resolved to a type

GSSAPIConfiguration cannot be resolved to a type

at org.jivesoftware.LoginDialog$LoginPanel.useSSO(LoginDialog.java:666)

at org.jivesoftware.LoginDialog$LoginPanel.(LoginDialog.java:390)

at org.jivesoftware.LoginDialog.invoke(LoginDialog.java:133)

at org.jivesoftware.Spark.startup(Spark.java:165)

… 6 more

Thanks in Advance

Mahesh