Error:SOAP UI SBL-EAI-04304 : Unknown Part '%1' for Operation '%2' exists ...

Hi,

I am testing one of the web services using SOAP UI. There is one input to the WF viz SiebelMessage(Type : Input) and another process property sMLSiebelMessge(Type : None) both having usingIntegration Object. When I am testing it using SOAPUI am getting the error below.

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">

   <SOAP-ENV:Body>

      <SOAP-ENV:Fault>

         <faultcode>SOAP-ENV:Client</faultcode>

         <faultstring>Unknown Part 'http://www.siebel.com/xml/**%20***%20Lead%20IO:ListOf**LeadIO'  for operation 'UpsertLead' exists in SOAP message.(SBL-EAI-04304)</faultstring>

         <detail>

            <siebelf:siebdetail xmlns:siebelf="http://www.siebel.com/ws/fault">

               <siebelf:logfilename>EAIObjMgr_nonsso_0084_88080397.log</siebelf:logfilename>