protected void loginButton_Click(object sender, EventArgs e)
 {
     Session.Clear();
     if (this.userIdTextBox.Text.Trim().Equals(""))
     {
         this.messageLabel.Text = "Please specify a user name!";
     }
     else if (this.userPasswordTextBox.Text.Trim().Equals(""))
     {
         this.messageLabel.Text = "Please specify a password!";
     }
     else
     {
         UsersDataAccess usersDataAccess = new UsersDataAccess();
         string          id   = this.userIdTextBox.Text;
         string          pwd  = this.userPasswordTextBox.Text;
         AmscoUser       user = usersDataAccess.AuthenticateUser(id, pwd);
         if (user.IsAuthenticated)
         {
             if (user.Role.Equals("Beta Tester"))
             {
                 Session["UserId"]   = user.Id;
                 Session["UserRole"] = user.Role;
                 Response.Redirect("~/Beta/BetaMain.aspx");
             }
             else
             {
                 this.messageLabel.Text = "You are not authorized!";
             }
         }
         else
         {
             this.messageLabel.Text = "You are not authenticated!";
         }
     }
 }