Client found response content type of 'multipart/related; type=“application/xop+xml”

Question

When I am calling Web service method, and getting this error,

"Client found response content type of 'multipart/related;   
type="application/xop+xml";    
boundary="uuid:8507df24-4a53-4943-9728-3297e243ddce";   
start="<root.message@cxf.apache.org>";   
start-info="application/soap+xml"', but expected 'application/soap+xml'.

The request failed with an empty response."

I m exacting "application/soap+xml" now , but how can I get "application/xop+xml" response?.

I have to solve this problem,

Thanks for any advice...