[Mono-aspnet-list] UpdatePanel and Systems.Net

[TM]

UpdatePanel does not work on linux. i use ubuntu 10.04. The monodevelop
version is 2.2. how do i solve this problem.
i use System.Net namespace to sendmail, when i deploy it on windows, it ok,
but on linux, it return a exception.
here is my code:
protected void btnSend_Click(object sender, EventArgs e)
    {
        SmtpClient smtp = new SmtpClient();
        smtp.Host = "smtp.gmail.com";
        smtp.Port = 587;
        smtp.UseDefaultCredentials = true;
        smtp.EnableSsl = true;
        smtp.Credentials = new NetworkCredential("middlecowboy at gmail.com",
"oldtrafford");
        
        MailAddress from = new MailAddress("middlecowboy at gmail.com", "Trần
Mạnh", System.Text.Encoding.Unicode);
        MailAddress to = new MailAddress("tranmanhdit at live.com", "Trần
Mạnh", System.Text.Encoding.Unicode);
        MailMessage message = new MailMessage(from, to);
        message.Subject = txtTopic.Text;
        StreamReader strReader = new
StreamReader(Server.MapPath("ContactUs/ContactUs.fmt"));
        string content = strReader.ReadToEnd();
        strReader.Close();
        content = string.Format(content, txtName.Text, txtAddress.Text,
txtPhone.Text, txtFax.Text, txtEmail.Text, txtTopic.Text, txtContent.Text);
        message.Body = content;
        message.IsBodyHtml = true;
        int tried = 1;
        do
        {
            try
            {
                smtp.Send(message);
                lbErrorMessage.Text = "Message has been sent!";
                lbErrorMessage.Visible = true;
                txtName.Text = string.Empty;
                txtAddress.Text = string.Empty;
                txtFax.Text = string.Empty;
                txtEmail.Text = string.Empty;
                txtTopic.Text = string.Empty;
                txtContent.Text = string.Empty;
                txtPhone.Text = string.Empty;
                break;
            }
            catch (Exception ex)
            {
                if (tried > 5)
                {
                    lbErrorMessage.Text = ex.Message;
                    lbErrorMessage.Visible = true;
                    break;
                }
            }
            ++tried;
        }
        while (true);
    }


Thanks
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