java.lang.ClassCastException: org.apache.xerces.dom.Deferred

Hi All,

I am invoking a webservice using a connector in wM 7.1.2. Its giving below soapFault:
soapProtocol: SOAP 1.1 Protocol
faultcode: SOAP-ENV:Client
faultstring: [ISS.0088.9251] JAX-RPC Handler failed to process the message
webM:message: Security Engine error while processing WS Security headers Cannot encrypt/decrypt data; nested exception is:
java.lang.ClassCastException: org.apache.xerces.dom.DeferredElementNSImpl

Could you please help me in resolving the issue with suitable resolution? I do not see any pointer regarding this either on wMUser or advantage.