Remove Namespace embedded with all fields

Hi Experts,

We have given a WSDL for SIebel team, when they post a record, Namespace is embedded for all the fields(Marked as red)

They tried to post using SOAP UI and got the below error: , Is there any way to handle this type of message with namespace for all fields.

Request from Siebel / SOAP UI to PI :

===================

<?xml version="1.0" encoding="UTF-8"?>

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<SOAP-ENV:Body>

<MT_ContractPaymentSumamry_Req_out xmlns="http://contractpaymentsummary">

<ContractPaymentSummary xmlns="http://contractpaymentsummary">

<AccountNum xmlns="http://contractpaymentsummary">224122</AccountNum>

</ContractPaymentSummary></MT_ContractPaymentSumamry_Req_out>

</SOAP-ENV:Body></SOAP-ENV:Envelope>

Response:

========

<context>XIAdapter</context>

<code>ADAPTER.JAVA_EXCEPTION</code>

<text>com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.engine.interfaces.messaging.api.exception.MessagingException: Application:EXCEPTION_DURING_EXECUTE:

at com.sap.aii.adapter.soap.web.SOAPHandler.processSOAPtoXMB(SOAPHandler.java:663)

PI XML file from Test Message in Message Mapping:(works fine)

======================================

<?xml version="1.0" encoding="UTF-8"?>

<ns0:MT_ContractPaymentSumamry_Req_out xmlns:ns0="http://contractpaymentsummary">

   <ContractPaymentSummary>

      <AccountNum>2013</AccountNum>

   </ContractPaymentSummary>

</ns0:MT_ContractPaymentSumamry_Req_out>

Thanks,

Baskar