Sockets en C# , Problemita para acceder a paginas web

[Peterpay]

HttpWebRequest request;
HttpWebResponse response;
CookieContainer cookies;

#region Login Request;

string url = "https://www.tudominio.com";
string data = string.Format("parametrosdelform");
byte[] encodeddata = Encoding.ASCII.GetBytes(data);
request = (HttpWebRequest)WebRequest.Create(url);
request.AllowAutoRedirect = true;
request.CookieContainer = new CookieContainer();
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = encodeddata.Length;
Stream datawriter = request.GetRequestStream();

datawriter.Write(encodeddata, 0, encodeddata.Length);
datawriter.Close();

response = null;
try
{
response = (HttpWebResponse)request.GetResponse();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}

if (response.StatusCode != HttpStatusCode.Found) // si falla el login
{
Console.WriteLine("Server Unreachable");
response.Close();
request.KeepAlive = false;
return string.Empty;
}