How to fix the error: SOAP Logical Tree cannot be serialized?

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SOAP

message

I have the following Request xml:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tas="http://tempuri.org/taskDetails_msgSet">
   <soapenv:Header/>
   <soapenv:Body>
      <tas:msg_ADDTASKREQ>
         <svcRequest>
            <svcHeader>
               <srvc_nm></srvc_nm>
               <srvc_ver_nbr></srvc_ver_nbr>
               <external_id></external_id>
               <action></action>
               <log_level></log_level>
               <mqmd_info></mqmd_info>
               <uid></uid>
               <uid_generated_by></uid_generated_by>
               <service_status></service_status>
               <status_code></status_code>
               <status_code_type_desc></status_code_type_desc>
               <status_code_desc></status_code_desc>
               <status_additional_info></status_additional_info>
            </svcHeader>
            <svcBody>
               <task_details>
                  <task_id></task_id>
                  <parent_task_id>40006812</parent_task_id>
                  <status_character>GREEN</status_character>
                  <due_date>2015-06-05</due_date>
                  <task_created_on>2015-03-06</task_created_on>
                  <date_projected>9999-01-31</date_projected>
                  <date_completed></date_completed>
                  <assigned_to>achatur5</assigned_to>
                  <total_labour_hours>80</total_labour_hours>
                  <sprf_number>6812</sprf_number>
                  <task_category>WMB Service Development</task_category>
                  <project_number>809</project_number>
                  <task_release>Q1_2015</task_release>
                  <active_flag>Y</active_flag>
                  <created_on>2015-03-09</created_on>
                  <modified_on>1982-06-06</modified_on>
                  <created_by>mrani</created_by>
                  <modified_by>vivek</modified_by>
                  <tasktracker_taskid>1255</tasktracker_taskid>
                  <add_url>http://uniteddocs.uhc.com/itservices2/AETeam/SA/WMB%20Services/Spec%20+%20Requests/NDB/N5938S86_FF2%20(N5938S00)/WMB%20Serv%20Req%20N5938S86_FF2%20v1%200.doc</add_url>
                  <description>SUIT Setup</description>
                  <percentage>80</percentage>
               </task_details>
            </svcBody>
         </svcRequest>
      </tas:msg_ADDTASKREQ>
   </soapenv:Body>
</soapenv:Envelope>

The Response which i am getting does explain the error but i am failing to resolve it:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
   <soapenv:Body>
      <soapenv:Fault>
         <faultcode>soapenv:Server</faultcode>
         <faultstring>BIP3113E: Exception detected in message flow taskoperations.SOAP Input (broker MB7BROKER)</faultstring>
         <detail>
            <Text>BIP3752E: The SOAP Reply node 'taskoperations.SOAP Reply' encountered an error while processing a reply message.
An error occurred during reply message processing.
See previous error messages to determine the cause of the error. : F:\build\S700_P\src\WebServices\WSLibrary\ImbSOAPReplyNode.cpp: 316: ImbSOAPReplyNode::evaluate: ComIbmSOAPReplyNode: taskoperations#FCMComposite_1_2
BIP3605E: The SOAP logical tree cannot be serialized.
There is a problem with the SOAP logical tree format.
Review further error messages for an indication to the cause of the error.
Check that the SOAP logical supplied is correctly formatted. :
F:\build\S700_P\src\WebServices\WSLibrary\ImbSOAPParser.cpp: 1212: ImbSOAPParser::refreshBitStreamFromElements: :
BIP3602E: The Web service payload ''{}msg_ADDTASKRESP'' does not match an operation described by WSDL binding ''taskDetails_msgSetSOAP_HTTP_Binding'' in file ''C:\ProgramData\Application Data\IBM\MQSI\components\MB7BROKER\eb9c44ca-4b01-0000-0080-b5c4b455f0fd\config\XSD\task_WSDL/org/tempuri/taskdetailsmsgset/taskDetails_msgSetService.wsdl''.
The first child of the SOAP Body does not correspond to any of the operations defined in the specified WSDL definition.
Check that the correct WSDL definition was deployed. : F:\build\S700_P\src\WebServices\WSLibrary\ImbSOAPParser.cpp: 696: ImbSOAPParser::refreshBitStreamFromElements: :</Text>
         </detail>
      </soapenv:Fault>
   </soapenv:Body>
</soapenv:Envelope>