unable to send mail

Question

i want to send sms from asp.net application . i have written this code for sending mail .

try

        {

            string filename = Server.MapPath("~/App_Data/FeedBack.txt");

            string mailbody = System.IO.File.ReadAllText(filename);

            mailbody = mailbody.Replace("##Name##", txtName.Text);

            mailbody = mailbody.Replace("##Email##",txtEmail.Text);

            mailbody = mailbody.Replace("##contact##",txtContact.Text);

            mailbody = mailbody.Replace("##Commnect##",txtSuggestion.Text);

            MailMessage myMessage = new MailMessage();

            myMessage.Subject = "Responce from website";

            myMessage.Body = mailbody;

            myMessage.From = new MailAddress("[email protected]","Amit Kumar");

            myMessage.To.Add(new MailAddress("[email protected]", "Amit Verma"));

            SmtpClient mysmptclient = new SmtpClient();

            mysmptclient.Send(myMessage);

            formatTable.Visible = false;

            lblMail.Text = "Your Feedback has been sent successfully";

            lblMail.ForeColor = Color.Green;

        }

        catch

        {

            lblMail.Text = "unable to sent the feedback .Check your smpt server";

            lblMail.ForeColor = Color.Red;

        }

 but after clicking on submit button i get a exception like "unable to sent the feedback .Check your smpt server"

i also configured smpt setting in web.config file

<system.net>

  <mailSettings>

    <smtp from="[email protected]">

      <network host="smtpout.secureserver.net" password="myemailpassword" userName="[email protected]"/>

    </smtp>

  </mailSettings>

</system.net>