Why Email does't work in GoDaddy Server?

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C#

ASP.NET

I have written a email code it works fine locally but when i uploaded this code to GoDaddy server nothing heppens even not showing me any error.

Why i am getting this problem, can anybody help me to solve this issue?

Please reply....

below is my code....

protected void btnSubmit_Click(object sender, EventArgs e)
   {
       try
       {
           MailMessage Msg = new MailMessage();
           // Sender e-mail address.
           Msg.From = new MailAddress(txtEmail.Text);
           // Recipient e-mail address.
           Msg.To.Add("xxxxx");
           Msg.Subject = txtSubject.Text;
           string details = txtmobile.Text + '\n';
           Msg.Body = details + txtMessage.Text;
           // your remote SMTP server IP.
           SmtpClient smtp = new SmtpClient();
           smtp.Host = "smtpout.secureserver.net";
           smtp.Port = 80;
           smtp.Credentials = new System.Net.NetworkCredential("xxxx", "xxxx");
           smtp.EnableSsl = false;
           smtp.Send(Msg);
           //Msg = null;
           lbltxt.Text = "Thank you for contacting us.";
           // Clear the textbox valuess
           txtName.Text = "";
           txtSubject.Text = "";
           txtmobile.Text = "";
           txtMessage.Text = "";
           txtEmail.Text = "";
       }
       catch (Exception ex)
       {
           Console.WriteLine("{0} Exception caught.", ex);
       }
   }