SSL XML download file

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C#

Hi! Have some troubles - when i try to download xml file with using SSL and certificate authentication(with proxy), it does not working(( It work when i try download file from another local machine, when i try download from here for example: http://bank-ua.com/export/currrate.xml What is my problem?

using System;
using System.Net;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Runtime.InteropServices;
using SummaTechnology.CSTI.Common.Serializer;
using SummaTechnology.CSTI.Common.Utils;
using SummaTechnology.CSTI.Common.DataAccess;

namespace SelectClientCert
{
    class MyCerts
    {   
        private static int CERT_STORE_PROV_SYSTEM = 10;
        private static int CERT_SYSTEM_STORE_CURRENT_USER = (1 << 16);
        //private static int CERT_SYSTEM_STORE_LOCAL_MACHINE = (2 << 16);

        [DllImport("CRYPT32", EntryPoint = "CertOpenStore", CharSet = CharSet.Unicode, SetLastError = true)]
        public static extern IntPtr CertOpenStore(
            int storeProvider, int encodingType,
            int hcryptProv, int flags, string pvPara);

        [DllImport("CRYPT32", EntryPoint = "CertEnumCertificatesInStore", CharSet = CharSet.Unicode, SetLastError = true)]
        public static extern IntPtr CertEnumCertificatesInStore(
            IntPtr storeProvider,
            IntPtr prevCertContext);

        [DllImport("CRYPT32", EntryPoint = "CertCloseStore", CharSet = CharSet.Unicode, SetLastError = true)]
        public static extern bool CertCloseStore(
            IntPtr storeProvider,
            int flags);

        X509Certificate2Collection m_certs;

        public MyCerts()
        {
            m_certs = new X509Certificate2Collection();
        }

        public int Init()
        {
            IntPtr storeHandle;
            storeHandle = CertOpenStore(CERT_STORE_PROV_SYSTEM, 0, 0, CERT_SYSTEM_STORE_CURRENT_USER, "MY");
            IntPtr currentCertContext;
            currentCertContext = CertEnumCertificatesInStore(storeHandle, (IntPtr)0);
            int i = 0;
            while (currentCertContext != (IntPtr)0)
            {
                m_certs.Insert(i++, new X509Certificate2(currentCertContext));
                currentCertContext = CertEnumCertificatesInStore(storeHandle, currentCertContext);
            }
            CertCloseStore(storeHandle, 0);

            return m_certs.Count;
        }

        public X509Certificate2 this[int index]
        {
            get
            {
                if (index < 0 || index > m_certs.Count)
                    return null;
                else
                    return m_certs[index];
            }
        }
    }    
    class MyHttpResource
    {
        String m_url;

        public MyHttpResource(string url)
        {
            m_url = url;
        }

        public void GetFile()
        {
            string pro = "AF35AC9E7F6101DF461CC6F553088821856C7ECF";
            Console.WriteLine("GetFile start");
            HttpWebResponse result = null;            
            System.Net.ServicePointManager.CertificatePolicy = new MyPolicy();    
            try
            {
                WebProxy proxy = new WebProxy("squid.tgk-4.ru:3128", true);
                proxy.Credentials = new NetworkCredential("CSTI-CS", "sde486t");                
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(m_url);
                
                req.Proxy = proxy;
                //req.Credentials = CredentialCache.DefaultCredentials;                
                MyCerts mycert = new MyCerts();                   
                int cerNum = mycert.Init();
                Console.WriteLine("\r\n\r\nUsing certificates");
                for (int i = 0; i < cerNum; i++)
                {                 
                    if (mycert[i].Thumbprint.Equals(pro)) { Console.WriteLine("pro"); req.ClientCertificates.Add(mycert[i]); }                                                              
                    Console.WriteLine("Certificate" + i.ToString() + " Thumbprint " + mycert[i].Thumbprint);
                }
                result = (HttpWebResponse)req.GetResponse();

                StreamWriter writer = new StreamWriter(@"C:/123.txt");
                Console.WriteLine("\r\n\r\nStart GetResponseStream in GetFile");
                Stream ReceiveStream = result.GetResponseStream();

                #region For XML files             
                //Encoding encode = System.Text.Encoding.Default;
                #endregion

                #region For sites                
                Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
                #endregion
                Console.WriteLine("GetResponseStream complete\r\n\r\n");
                Console.WriteLine("result.IsMutuallyAuthenticated:  " + result.IsMutuallyAuthenticated);                
                Console.WriteLine("result.ResponseUri:  " + result.ResponseUri);
                Console.WriteLine("result.Headers:  " + result.Headers);               

                StreamReader sr = new StreamReader(ReceiveStream, encode);
                Console.WriteLine("\r\nResponse stream received");
                Char[] read = new Char[256];
                int count = sr.Read(read, 0, 256);

                Console.WriteLine("HTTP Response...\r\n");
                Console.WriteLine("Write into file");
                while (count > 0)
                {
                    String str = new String(read, 0, count);
                    Console.Write(str);
                    writer.WriteLine(str);
                    count = sr.Read(read, 0, 256);
                }
                writer.Close();
            }
            catch (WebException e)
            {
                Console.WriteLine(e.Message); 				
            }
            finally
            {
                if (result != null)
                {
                    result.Close();
                }
            }
        }
    }
    
    public class MyPolicy : ICertificatePolicy
    {
        public bool CheckValidationResult(
            ServicePoint srvPoint
            , X509Certificate certificate
            , WebRequest request
            , int certificateProblem)
        {
            return true;
        }
    }
   
    class CertSample
    {
        static void Main(string[] args)
        {         
            string str = @"Some protected certificate XML url ";                  
            try
            {
                MyHttpResource hr = new MyHttpResource(str);
                hr.GetFile();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
            Console.ReadKey();
            return;
        }
    }
}