GET запрос возвращает ошибку 404

        static string GET(string url)
        {
            HttpWebRequest reqGET = (HttpWebRequest)HttpWebRequest.Create(url);
            reqGET.UserAgent = "Mozilla/5.0 (Windows NT 6.1; rv:16.0) Gecko/20100101 Firefox/16.0";
            reqGET.AllowAutoRedirect = true;
            HttpWebResponse resp = (HttpWebResponse)reqGET.GetResponse();
            Stream stream = resp.GetResponseStream();
            StreamReader sr = new StreamReader(stream);
            return sr.ReadToEnd();
        }

            var requestUri = "http://shtok.ru/search?searchword=" + Uri.EscapeDataString( "Степлеры" );
 
            var req = (HttpWebRequest)WebRequest.Create( requestUri );
            req.Method = "GET";
            req.AutomaticDecompression = DecompressionMethods.GZip;
 
            using ( var resp = (HttpWebResponse)req.GetResponse() )
            using ( var stream = resp.GetResponseStream( ) )
            {
                File.WriteAllText( @"d:\dnld.html", new StreamReader( stream ).ReadToEnd() );
            }

            string searhString = "";
            string query = "searchword=" + searhString + "&Search=&searchphrase=all&ordering=newest&limit=100&task=search";
            byte[] queryArr = Encoding.UTF8.GetBytes(query);
            HttpWebRequest reqGET = (HttpWebRequest)WebRequest.Create("http://shtok.ru/");
            reqGET.UserAgent = "Mozilla/5.0 (Windows NT 6.1; rv:16.0) Gecko/20100101 Firefox/16.0";
            reqGET.AllowAutoRedirect = true;
            reqGET.Method = "POST";
            reqGET.ContentLength = queryArr.Length;
            reqGET.ContentType = "application/x-www-form-urlencoded";
            reqGET.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
            reqGET.GetRequestStream().Write(queryArr, 0, queryArr.Length);
            HttpWebResponse resp = (HttpWebResponse)reqGET.GetResponse();
            Stream stream = resp.GetResponseStream();
            StreamReader sr = new StreamReader(stream);
            MessageBox.Show(sr.ReadToEnd());