Problem consuming a ASP.NET asmx Web Service.

I am working for  EInvoice interface. I developed web service for income documents (Invoice,ApplicationResponse) and published to web server. But while consuming web service. We encountered exception.  What can we do to overcome this problem. 
The content type application/soap+xml; charset=utf-8 of the response message does not match the content type of the binding (multipart/related; type="application/xop+xml"). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly. The first 500 bytes of the response were: '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><soap:Code><soap:Value>soap:Receiver</soap:Value></soap:Code><so ...