Any Error in Code for sending mail on godaddy server

I am suffering performance issues in sending mail , sometimes its send and sometime not....please check the code below and tell if anythings wrong in there.....
Following in the code in codebehind file (c#).....
protected void txtSubmit_Click(object sender, EventArgs e)
{

try

{

// send the mail
MailMessage msg = new MailMessage();
msg.IsBodyHtml = false;
msg.From = ...