Axis 1.21 SOAP serialization problem.

[mtim]

I have a handler on client side that gets the SOAP message  and
attaches the SOAP header element to it. Before I attach the header
element the name of the body element contains: namespace and local
part only, _no prefixes_. :
        <RequestElement xmlns="http://example.com";>
But after I  attach  the SOAP header the name of the body element is
changing  and contains a prefix "ns1".
        <ns1:RequestElement xmlns:ns1="http://example.com";>

Is there a way to preserve the original format. I'm signing the SOAP
Body and verification of the signature fails for me now, when I modify
SOAP header ?

Thanks in advance.


---------- Before I attach SOAP Header ----------------
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
    <soapenv:Body>
        <RequestElement xmlns="http://example.com";>
        .....
        </RequestElement>
    </soapenv:Body>
</soapenv:Envelope>

---------- After I attach SOAP Header ----------------
<?xml version="1.0" encoding="UTF-8"?>
<soapenv:Envelope
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>

    <soapenv:Header>
        <HeaderElement 
soapenv:actor="http://www.mapinfo.com/envinsa/ws/async";
soapenv:mustUnderstand="0" xmlns="http://www.example.com/ws"/>
    </soapenv:Header>

    <soapenv:Body>
        <ns1:RequestElement xmlns:ns1="http://example.com";>
        </ns1:RequestElement>
    </soapenv:Body>
</soapenv:Envelope>