protected void Page_Load(object sender, EventArgs e)
    {
        Util util = new Util();

        string customer_id = Request.QueryString.Get("id");
        if (!IsPostBack)
        {
            bool is_active = util.ActivateCustomerAccount((Hashtable)HttpRuntime.Cache[Session.SessionID], customer_id);
            if (is_active)
            {
                Message.Text = "Your account has been activated. You can now login to the ViziApps Studio.";
            }
            else
            {
                Message.Text = "Your email is not recognized.";
                LoginButton.Visible = false;
            }
        }
    }