Web Forms :: Email Doesn't Work In IE

The forms works fine in Firefox and I was able to get an email from it. Here is the code below:

Partial Class _Default
Inherits System.Web.UI.Page
''' <summary>
''' Actions when the Send button is clicked.
''' </summary>
'''
Protected Sub btnSend_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSend.Click
If Not Page.IsValid Then Exit Sub
'Create instance of main mail message class.
Dim mailMessage As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
'Configure mail mesage
'Set the From address with user input
mailMessage.From = New System.Net.Mail.MailAddress(txtEmailAddress.Text.Trim()).........