Problem with invoking ESB Services Exposed via Web Services (EBWS) in JBoss ESB

Issue

• I am trying to invoke the ESB Services Exposed via Web Services (EBWS) below on SOA-P 5:

<service category="Sample" name="SampleService" description="...">
    <listeners> ... </listeners>
    <actions mep="RequestResponse"
        inXsd="/request.xsd" outXsd="/response.xsd" faultXsd="/fault.xsd"
        webservice="true" validate="false">
        ...
    </actions>
</service>

• However, I get the following web service responses:

<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
   <env:Header/>
   <env:Body>
      <env:Fault>
         <faultcode>env:Server</faultcode>
         <faultstring>Unexpected invocation target exception from processor</faultstring>
      </env:Fault>
   </env:Body>
</env:Envelope>

• How should I fix it?