[jbpm-users] have a trouble when deploy jbpm5 on websphere6.1

it's ok to deploy my jbpm5 project on tomcat.but have a trouble when deploy jbpm5 on websphere6.1. exception : Caused by: java.lang.ClassCastException: [Ljava.lang.Object; incompatible with [Ljava.util.Map$Entry; at org.drools.marshalling.impl.OutputMarshaller.writePropagationContexts(OutputMarshaller.java:716) to sandeep kumar : u had the same trouble , did u resolve it? help me. how to handl it?