Unable to retrive data from any webservice-- using KSoap2

Hi

I'm trying to use KSoap2 to communicate with the webservices. but every time
getting exception : org.ksoap2.SoapFault
        at org.ksoap2.transport.HttpTransport.call(+357)


and enveloper.getResponse() returns
--SoapFault-faultCode,Server.userException,IllegalArgumentException and
ClassCastException

I checked it with network monitor and it the envelope it is sending looks
strange also the response code of the response is 500 -- Internal Server Error.

Following is the code which i'm trying:

 public void run(){
		try {
			SoapObject rpc =
				new SoapObject("urn:Convert", "convertLength");

			rpc.addProperty("fromUnit", "Meters");
                        rpc.addProperty("fromValue", "1000");
                        rpc.addProperty("toUnit", "Kilometers");
                        

			SoapSerializationEnvelope envelope =
				new SoapSerializationEnvelope(SoapEnvelope.VER10);

			envelope.bodyOut = rpc;
			

			HttpTransport ht = new
HttpTransport("http://www.blackberry.com:80/webservices/ConvertAxis/services/Convert");
			ht.debug = true;
             
			ht.call("", envelope);
                        System.out.println(""+envelope.getResponse());
			//resultItem.setText("" + envelope.getResult());
		}
		catch (Exception e) {
			e.printStackTrace();
			resultItem.setLabel("Error:");
			resultItem.setText(e.toString());
		}

I have also attached the wsdl file.

I tried searching for it on google , but couldn't find any good tutorials.

Please help!!





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