Invocation of WebService dynamically using WSDL throws Exception. Works for simple types

I have a NotificationConsumer (part of WS-Notification specification) web service generated from a wsdl (wsgen Xfire Ant Task) and deployed to JBOSS.4.0.5.GA. The client and server stubs were generated using wsgen ant task. The calls to server works fine using SOAP UI and the client stub. But when using dynamic client, a Parser error is thrown. On checking the wsdl, I see that one namespace qualification is not correctly generated in the wsdl of the deployed web service.

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