Konvertering fra C# til VB .net

Hej

Følgende C# kode sender data korrekt:
  Dim request As HttpWebRequest

        Dim URL As String = "http://blabla.kundeside.dk/json?key=t6%$SVAK7"

        request = DirectCast(WebRequest.Create(URL), HttpWebRequest)

        request.Method = "POST"

        request.ContentType = "application/x-www-form-urlencoded"

        Using Writer As New StreamWriter(request.GetRequestStream())

            Writer.Write("new_username=" & new_username & "new_email=" & new_email & "new_password=" & new_password)

        End Using

Jeg har forsøgt at oversætte til VB .net:
Dim request As HttpWebRequest
        Dim URL As String = "http://blabla.kundeside.dk/json?key=t6%$SVAK7"
        request = DirectCast(WebRequest.Create(URL), HttpWebRequest)
        request.Method = "POST"
        request.ContentType = "application/x-www-form-urlencoded"
        Using Writer As New StreamWriter(request.GetRequestStream())
            Writer.Write("new_username" = "Steen&new_email=ssa@phv.dk&new_password=123456")
        End Using


...men i VB .net situationen får jeg ikke sendt data korrekt. Der opstår dog ingen fejl :-/