Any Solution for Weblogic ASSERTION FAILED Error?

Hi there..
I am getting the following Exception when I try to deploy my bean named Forum in weblogic6.1. I was able to clear all the descriptor/exception related errors and I am unable to clear this error. Anybody came accross the similar error?
ERROR MESSAGE FOLLOWS.....
weblogic.utils.AssertionError: ***** ASSERTION FAILED *****[ Deployment Error: java.lang.NoSuchFieldException ]
.................. a lot of messages
and

javax.management.RuntimeErrorException: Error thrown by the setAttribute weblogic.management.internal.WebLogicAttribute@69b824method of the Dynamic MBean
at com.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:1361)

TIA
RC

Ranjith,
I believe, and correct me if I'm wrong, that the Assertion Error class has been deprecated in version 6.x. Was your Forum ejb developed and deployed first on 5.1? If so, have you tried recompiling the bean with the 6.1 ejbc compiler, and then redeploying?