webservice, getting empty response

' Create a request using a URL that can receive a post. '
        Dim request As WebRequest = WebRequest.Create(url)
        ' Set the Method property of the request to POST.'
        request.Method = "POST"
        request.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials
        ' Create POST data and convert it to a byte array.'
        Dim postData As String = ioLines
        Dim byteArray As Byte() = Encoding.UTF8.GetBytes(ioLines)


        ' Set the ContentType property of the WebRequest.'
        request.ContentType = "application/x-www-form-urlencoded"
        ' Set the ContentLength property of the WebRequest.'
        request.ContentLength = byteArray.Length
        ' Get the request stream.'
        Dim dataStream As Stream = request.GetRequestStream()
        ' Write the data to the request stream.'
        dataStream.Write(byteArray, 0, byteArray.Length)
        ' Close the Stream object.'
        dataStream.Close()
        ' Get the response.'
        Dim response As WebResponse = request.GetResponse()
        ' Display the status.'
        Console.WriteLine(CType(response, HttpWebResponse).StatusDescription)


        ' Get the stream containing content returned by the server.'
        dataStream = response.GetResponseStream()
        ' Open the stream using a StreamReader for easy access.'
        Dim reader As New StreamReader(dataStream)
        ' Read the content.'
        Dim responseFromServer As String = reader.ReadToEnd
        ' Display the content.'
        Console.WriteLine(responseFromServer)

        ' Clean up the streams.'
        reader.Close()
        dataStream.Close()
        response.Close()

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