Downloading attachments from Exchange with WebDAV

I've been trying to retrive attachment from message in Exchange 2003 server using WebDAV.

Ican successfully read messages and retrive list of attachments. However I am failing to save attachments. In both cases errors is:

"The remote server returned an error: <403> Forbidden.

Any idea what I'm doing wrong? My code:

        static void Main(string[] args)
    {

        HttpWebRequest Request;
        WebResponse Response;
        CredentialCache MyCredentialCache;
        string attachment = "http://mailserver/Exchange/Username/Inbox/Test.EML/Test.txt";
        string strUserName = "username";
        string strPassword = "password";
        string strDomain = "domain";

        try
        {
            // HttpWebRequest
            MyCredentialCache = new System.Net.CredentialCache();
            MyCredentialCache.Add(new System.Uri(attachment), "NTLM", new NetworkCredential(strUserName, strPassword, strDomain));

            Request = (HttpWebRequest)HttpWebRequest.Create(attachment);
            Request.Credentials = MyCredentialCache;
            Request.Method = "GET";
            Response = (HttpWebResponse)Request.GetResponse();
        }
        catch(Exception ex)
            {
                Console.WriteLine(ex.Message.ToString());
            }

        try
        {
            //开发者_如何学CWeb Client 
            string downloadPath = "D:\\Downloads";

            WebClient wcClient = new WebClient();
            wcClient.Credentials = new NetworkCredential(strUserName, strPassword, strDomain);
            string file = Path.GetFileName(attachment);
            string filename = Path.Combine(downloadPath, file);
            wcClient.DownloadFile(attachment, filename);
        }

        catch (Exception ex)
        {
            Console.WriteLine(ex.Message.ToString());
        }

        Console.ReadLine();

    }

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I have found solution to my problem. I created a post here showing examples: http://arturito.net/2010/03/26/c-sharp-saving-email-attachments-microsof-exchange-webdav/

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Consider also use EWS Api, WebDaw not is enabled by default in Exchange 2007 servers.