I'm having an issue with IE where clicking the button won't send the email. It works fine in FF. Any ideas?

Html:

    <asp:Button onclick="sentButton_Click" type="submit" ID="sentButton" runat="server" Text="Send" 
            TabIndex="5" />

code behind:

    protected void sentButton_Click(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            try
            {
                string output = "";

                MailMessage mail = new MailMessage();

                string hostAddress = "mail.trailsticker.com";

                string message = messageTextBox.Text.ToString();
                message = message.Replace(Environment.NewLine, "<br />");

                string fromEmail = emailTextBox.Text.ToString();
                string subject = subjectDropDown.Text.ToString();

                output = "<p>Name: " + nameTextBox.Text.ToString() + ".</p>";
                output += "<p>E-mail: " + emailTextBox.Text.ToString() + ".</p>";
                output += "<p>Subject: " + subjectDropDown.Text.ToString() + ".</p>";
                output += "<p>Message: " + message + ".</p>";

                mail.Subject = subject;
                mail.From = new MailAddress(fromEmail);
                mail.To.Add("xxxxxxx@trailsticker.com");
                mail.Body = message;

                mail.IsBodyHtml = true;
                SmtpClient smtp = new SmtpClient(hostAddress);
                smtp.Send(mail);

                Response.Redirect("http://www.trailsticker.com/sent.aspx");
            }
            catch (Exception err)
            {
                notificatoinLabel.Text = "E-mail wasn't sent. There was an exception: " + err.ToString() + ".";
            }
        }
    }

And do we get to see the RENDERED HTML instead of the server side code??

That's probably a good idea. It can be seen here: http://www.trailsticker.com/contact.aspx

Or here's the code for the button.

<input type="submit" name="ctl00$ContentPlaceHolder1$sentButton" value="Send" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$ContentPlaceHolder1$sentButton&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, false, false))" id="ctl00_ContentPlaceHolder1_sentButton" tabindex="5" />

I think my issue was due to a second button on the page. I removed that and it seems to work now. Must be a problem with how they submit.