[Помогите!] Автовризация Play station network

[CSharpK]

Паршу token GET запросом, но при отправки POST запроса он уже изменяется (он меняется при каждой загрузки страницы)

Что можно сделать в такой ситуации? Дайте пожалуйста пример, облазил уже все, не могу найти ничего дельного

string prt = "<input type=\"hidden\" name=\"struts.token\" value=\"(.*)\" />";
        public void http_auth_psn()
        {
            //*****************************
            //Получаем struts.token
            //*****************************
            System.Net.ServicePointManager.ServerCertificateValidationCallback = delegate { return true; };
            System.Net.WebRequest reqGET = System.Net.WebRequest.Create("https://account.sonyentertainmentnetwork.com/login.action");
            System.Net.WebResponse resp = reqGET.GetResponse();
            System.IO.Stream stream = resp.GetResponseStream();
            System.IO.StreamReader sr = new System.IO.StreamReader(stream);
            string s = sr.ReadToEnd();
 
 
            //*****************************
            //Парсим
            //*****************************
            System.Text.RegularExpressions.Match res = System.Text.RegularExpressions.Regex.Match(s, prt);
 
            string result1 = res.Groups[1].ToString(); 
 
            //*****************************
            //POST запрос
            //*****************************
            var cookies = new CookieContainer();
            ServicePointManager.Expect100Continue = false;
            var request = (HttpWebRequest)WebRequest.Create("https://account.sonyentertainmentnetwork.com/login.action");
            request.CookieContainer = cookies;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36";
            request.Host = "account.sonyentertainmentnetwork.com";
            request.Headers.Add("Accept-Language", "ru,en;q=0.8,ja;q=0.6");
            request.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
 
 
            using (var requestStream = request.GetRequestStream())
            using (var writer = new StreamWriter(requestStream))
            {
                writer.Write("struts.token.name=struts.token&struts.token=" + result1 + "&j_username=asd%40anti4game.netai.net&rememberSignIn=on&j_password=3PFrvYn3TV3&service-entity=np");
            }
 
            using (var responseStream = request.GetResponse().GetResponseStream())
            using (var reader = new StreamReader(responseStream))
            {
                var result = reader.ReadToEnd();
                         
                string h = cookies.GetCookieHeader(new Uri("https://account.sonyentertainmentnetwork.com/"));
                if (Regex.IsMatch(h, @"rememberSignIn"))
                {
                    MessageBox.Show("Autorization good");
 
 
                }
                else
                {
                    MessageBox.Show("Autorization error");
 
                }
            }
        }