[Axis2] Request from Axis2 client code to remote svc gives error but request from nonAxis client works

[Pantvaidya, Vishwajit]

Using Axis2 1.3, I have written client code to call a remote webservice that 
does language translation- that call returns with a response message "Value 
cannot be null.
Parameter name: translationmode". When I call the same service with exactly the 
same data from a UI client or even Axis2 client stub (generated using 
wsdl2java) - it works - none of the messages sent have a transationmode param, 
so why does it complain for my client while it does not for the others.

I tried comparing the requests sent in each case - but I did not see great 
differences. I have even removed some of those - e.g. I diaabled chunking in my 
client code, but still my client code does not work. I am thinking, the problem 
has got to be in my client code - can anyone see anything wrong in it? I am 
pasting the code and the corresponding request-responses here.

My client code

String serviceURLStr="http://www.webservicex.net/TranslateService.asmx";;
String action="http://www.webservicex.net/Translate";;
String serviceNamespace="http://www.webservicex.net/";;
String operationName="Translate";
String langModeParamName="LanguageMode";
String textParamName="Text";

ServiceClient svcClient;
try {
      svcClient = new ServiceClient();
      Options opts = new Options();
      opts.setTo(new EndpointReference(serviceURLStr));
      opts.setAction(action);
      opts.setProperty(org.apache.axis2.transport.http.HTTPConstants.CHUNKED, 
Boolean.FALSE);
      svcClient.setOptions(opts);

      OMFactory fac = OMAbstractFactory.getOMFactory();
      OMNamespace ns = fac.createOMNamespace(serviceNamespace, "ns1");
      OMElement payload = fac.createOMElement(operationName, ns);

      OMElement langModeElem = fac.createOMElement(langModeParamName, ns);
      langModeElem.setText("EnglishTOFrench");
      payload.addChild(langModeElem);

      OMElement textElem = fac.createOMElement(textParamName, ns);
      textElem.setText("Hello 1");
      payload.addChild(textElem);

      OMElement responseElem=svcClient.sendReceive(payload);
      OMElement rateElem=responseElem.getFirstElement();
      String convertedText=rateElem.getText();
}...

The corresponding request that got sent out

POST /TranslateService.asmx HTTP/1.1
Content-Type: text/xml; charset=UTF-8
SOAPAction: "http://www.webservicex.net/Translate";
User-Agent: Axis2
Host: localhost:8050
Content-Length: 313

<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope 
xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";><soapenv:Body><ns1:Translate
 
xmlns:ns1="http://www.webservicex.net/";><ns1:LanguageMode>EnglishTOFrench</ns1:LanguageMode><ns1:Text>Hello
 1</ns1:Text></ns1:Translate></soapenv:Body></soapenv:Envelope>

The response I got

HTTP/1.1 200 OK
Date: Thu, 24 Jan 2008 00:29:33 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Cache-Control: private, max-age=0
Content-Type: text/xml; charset=utf-8
Content-Length: 409

<?xml version="1.0" encoding="utf-8"?><soap:Envelope 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema";><soap:Body><TranslateResponse 
xmlns="http://www.webservicex.net";><TranslateResult>Value cannot be null.
Parameter name: 
translationmode</TranslateResult></TranslateResponse></soap:Body></soap:Envelope>


Request sent from a UI client like soapUI

POST /TranslateService.asmx HTTP/1.1
Content-Type: text/xml;charset=UTF-8
SOAPAction: "http://www.webservicex.net/Translate";
User-Agent: Jakarta Commons-HttpClient/3.0.1
Host: localhost:8050
Content-Length: 373

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:web="http://www.webservicex.net";>
   <soapenv:Header/>
   <soapenv:Body>
      <web:Translate>
         <web:LanguageMode>EnglishTOFrench</web:LanguageMode>
         <!--Optional:-->
         <web:Text>Hello 2</web:Text>
      </web:Translate>
   </soapenv:Body>
</soapenv:Envelope>

And this is the correct response I got for the soapUI request

HTTP/1.1 200 OK
Date: Thu, 24 Jan 2008 00:20:29 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Cache-Control: private, max-age=0
Content-Type: text/xml; charset=utf-8
Content-Length: 364

<?xml version="1.0" encoding="utf-8"?><soap:Envelope 
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema";><soap:Body><TranslateResponse 
xmlns="http://www.webservicex.net";><TranslateResult>Bonjour 
2</TranslateResult></TranslateResponse></soap:Body></soap:Envelope>