Apps Android client using .Net web service

[paxel]

Hi
Recently I have been trying to connect to a .Net web service using a Android App. I've tried various tutorials but none of them have worked so far.

The code got so far
private String[] getViewedTours(String city) {
String SOAP_ACTION = "http://mcom.se/GetTours2";
String METHOD_NAME = "GetTours2";
String NAMESPACE = "http://mcom.se/";
String URL = "http://mcom.se/TourService.asmx";
String[] tours = new String[100];
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

PropertyInfo pi = new PropertyInfo();
pi.setName("location");
pi.setValue(city);
request.addProperty(pi);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);

AndroidHttpTransport androidHttpTransport = new AndroidHttpTransport(URL);

try
{
androidHttpTransport.call(SOAP_ACTION, envelope);

SoapPrimitive result = (SoapPrimitive)envelope.getResponse();
String tourString = result.toString();
}
catch (Exception e) {}

It works as long as I don't uses the parameters, but as soon as I add the parameters the application throws a java.lang.classcastexception: org.ksoap2.serialization.soapobject exception.

The code for the web service is

public string GetTours2(string loc)
{
........
DataSet myDataSet = new DataSet();
myDataAdapter.Fill(myDataSet, "mytable");
DataTable dt = myDataSet.Tables[0];

string tourid = "";
for (int i = 0; i < dt.Rows.Count; i++)
{
DataRow dr = dt.Rows;
tourid += (int)dr["id"] + " ";
}
return tourid;
}

It would be nice if anyone could take a look at this, because i'm so stuck at the moment.
Cheers David