SOAP request and response problem

[MarcoBorn]

Hello Forum,
I use VB.NET in SharpDevelop to create my first SOAP client. I set a web reference to the WSDL and got a class generated which offers me request, response, clientheader and service elements. (The clientheader is used to store username, password and mailadress for authentification.)
Then in my class I made the following:

Sub Button1Click(sender As Object, e As EventArgs)
  Dim Myrequest As New MyNamespace.addRequest 
  Dim Myrespons As New MyNamespace.addResponse
  Dim Myheader As New MyNamespace.clientHeader
  Dim Myservic As New MyNamespace.service
 
  Myheader.clientName = "Username"
  Myheader.clientEmail ="[e-mail]"
  Myheader.clientPassword = "password"
  Myrequest.city="city"
  Myrequest.clientHeader = myheader
  Myrequest.country="country"
  Myrequest.district="district"
  Myrequest.houseNumber="number"
  Myrequest.postalCode ="postalcode"
  Myrequest.street="street"
  Myrequest.subscriberId="12345"
  Myresponse = Myservice.addSubscriber(Myrequest)
  MsgBox(Myresponse.resultMessage)
End Sub
 

When calling the line Myresponse=Myservice.addSubscriber(Myrequest) my client crashes. How I can send the request to the server and retrieve the response for further use? What I'm doing wrong?

Any help is appreciated.

Thanks a lot in advance,
Marco