[rules-users] Unable to save or validate facts in Guvnor

Hi, I can't save or validate any facts or pojo models in my guvnor. The guvnor console is coming and i can browse through it but when i'm trying to save or validate any items i'm getting some errors as below. Is there any repository related problem??... how can i solve it?? 0000039 SystemErr R Exception in thread "pool-1-thread-1" java.lang.AbstractMethodError: org/drools/repository/UserInfo$Command.process(Ljava/lang/String;)V [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at org.drools.repository.UserInfo.eachUser(UserInfo.java:179) [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at org.drools.guvnor.server.repository.MailboxService.processOutgoing(MailboxService.java:81) [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at org.drools.guvnor.server.repository.MailboxService$3.run(MailboxService.java:127) [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665) [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690) [2/8/12 13:56:49:148 IST] 00000039 SystemErr R at java.lang.Thread.run(Thread.java:810) [2/8/12 13:56:49:155 IST] 0000003a SystemErr R Exception in thread "pool-1-thread-2" java.lang.AbstractMethodError: org/drools/repository/UserInfo$Command.process(Ljava/lang/String;)V [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at org.drools.repository.UserInfo.eachUser(UserInfo.java:179) [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at org.drools.guvnor.server.repository.MailboxService.processOutgoing(MailboxService.java:81) [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at org.drools.guvnor.server.repository.MailboxService$1.run(MailboxService.java:67) [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665) [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690) [2/8/12 13:56:49:156 IST] 0000003a SystemErr R at java.lang.Thread.run(Thread.java:810) -- View this message in context: http://drools.46999.n3.nabble.com/Unable-to-save-or-validate-facts-in-Guv... Sent from the Drools: User forum mailing list archive at Nabble.com.