soap sender error in PO 7.5 single stack

Hi all,

I got the soap sender error during test when i went on with a syn soap2rest scenario.

When test using Web Service navigator,  I got the error msg: WSDL1.1, WSDL2.0 definition element expected. Found [html: null].

When test using soapui, i got the error msg:

    <faultcode>SOAP:Server</faultcode>

         <faultstring>Server Error</faultstring>

         <detail>

            <s:SystemError xmlns:s="http://sap.com/xi/WebService/xi2.0">

               <context>XIAdapter</context>

               <code>ADAPTER.JAVA_EXCEPTION</code>

               <text>com.sap.aii.af.service.cpa.CPAObjectNotFoundException: Couldn't retrieve inbound binding for the given P/S/A values: FP=;TP=;FS=null;TS=;AN=null;ANS=null;

i went through following threads but not help:

Couldn't retrieve inbound binding for the given P/S/A values

Error while posting SOAP message

Could any one help me to fix this ? Many thanks!