I have a response message like this:

<message>
    <header>
        <TransactionID>1</TransactionID>
        <Timestamp>2012-05-22 10:10:36</Timestamp>
        <OpCode>BOSS_DELETE_USER_SME.CD</OpCode>
        <MsgType>RESP</MsgType>
        <ReturnCode>1016</ReturnCode>
        <ErrorMessage>uif return error message!</ErrorMessage>
    </header>
</message>

I need convert RetuenCode "1016" to "0" in extension class. How to get OMElement "ReturnCode" in mediate? My code is failed.

SOAPEnvelope envelope = context.getEnvelope();
SOAPBody soapBody = envelope.getBody();
QName ReturnCode = new QName(null, "ReturnCode");       
OMElement response = soapBody.getFirstChildWithName(ReturnCode);