TICKET BAI (TicketBAI); Nuevo sistema de la Agencia Tributaria del Pais Vasco

[jaiser]

No se porque me da el error 503. Estoy progrmamando en vb.net, no se si alguien me puede ayudar a ver donde está el error, lo he pasado a c el código.

public void envio(System.Xml.XmlDocument xml, System.Security.Cryptography.X509Certificates.X509Certificate2 certificado)
{
    byte[] sentXml = System.Text.Encoding.UTF8.GetBytes(xml.OuterXml);
    Stream stream;

    request.Method = "POST";
    request.ContentType = "application/xml; charset=utf-8";
    request.ContentType = "text/xml; charset=utf-8";
    request.Timeout = 3000000;
    request.ClientCertificates.Add(certificado);
    // soap action (this is the header I tried to add. Didn't work.)
    request.Headers.Add("SOAPAction", "h t t p s://tbai-prep.egoitza.gipuzkoa.eus/WAS/HACI/HTBRecepcionFacturasWEB/rest/recepcionFacturas/alta");

    // Set the ContentLength property of the WebRequest.
    request.ContentLength = sentXml.Length;

    stream = request.GetRequestStream();

    try
    {
        stream.Write(sentXml, 0, sentXml.Length);
    }
    catch (Exception ex)
    {
        Interaction.MsgBox("Error Sending Data: " + ex.Message);
    }

    // Close the Stream object.
    stream.Close();

    try
    {
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Console.WriteLine("Received response with status {0} {1}.", response.StatusCode, response.StatusDescription);

        if (response.StatusCode == HttpStatusCode.OK)
        {
            XmlDocument responseXML = new XmlDocument();
            Stream a = response.GetResponseStream;
            StreamReader reader = new StreamReader(a);
            Interaction.MsgBox(reader.ReadToEnd());

            responseXML.Load(response.GetResponseStream());
            responseXML.Save("respuesta.xml");
            responseXML.Save(Console.Out);
        }

        response.Close();
    }
    catch (Exception ex)
    {
        Interaction.MsgBox("Error Getting Response: " + ex.Message);
    }
}