Error in RosettaNet samples

I am trying to run RosettaNet4.5 samples.
When I tried to run PIP3A4 Sample, I am getting method not found exception and message is as follows


n error occurred while tracing.

com.wm.lang.flow.FlowException: ip.cm.handlers:processDocument(): Error trapped in service: wm.server.flow:stepFlow
Error:
Error: ip.cm:startConversation():
Error Message: com.wm.app.tn.cm.ConversationEngine: method createConversation(Ljava/lang/String;Lcom/wm/app/tn/cm/ConversationScript;)V not found


Please let me know if anyone has solutions for this.

Thanks
Shiv