Unmarshall issue with xsi:type specified bean property

2006-10-12 09:08:18,539 ERROR [org.jboss.ws.jaxrpc.CallImpl] Call invocation failed with unkown Exception

javax.xml.rpc.JAXRPCException: org.jboss.ws.binding.BindingException: org.jboss.ws.jaxb.UnmarshalException: Failed to parse source: Type binding not found for type string specified with xsi:type for element

{http://netid.msu.edu:8080/lastmod.pl}

TimeChanged

at org.jboss.ws.soap.SOAPContentElement.getObjectValue(SOAPContentElement.java:303)

at org.jboss.ws.binding.EndpointInvocation.transformPayloadValue(EndpointInvocation.java:233)

at org.jboss.ws.binding.EndpointInvocation.getReturnValue(EndpointInvocation.java:182)

at org.jboss.ws.jaxrpc.CallImpl.syncOutputParams(CallImpl.java:873)

at org.jboss.ws.jaxrpc.CallImpl.invokeInternal(CallImpl.java:704)

at org.jboss.ws.jaxrpc.CallImpl.invoke(CallImpl.java:404)

at org.jboss.ws.jaxrpc.CallProxy.invoke(CallProxy.java:148)