SOAP error

Hi,

I have an Proxy to SOAP scenario.

Everything is absolutely ok . Proper Target URL and action is provided in the receiver communication channel.

But still , I am getting following error in receiver CC -

Message processing failed. Cause: com.sap.engine.interfaces.messaging.api.exception.MessagingException: SOAP: response message contains an error XIAdapter/PARSING/ADAPTER.SOAP_EXCEPTION - soap fault: The message with Action '' cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver. Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None).

Please help.