>Frank
>I'm using VS 2010.
>
>Here are the references:
>
>
>using System.Data;
>using System;
>using System.Diagnostics;
>using System.Net.Mail;
>using System.Net;
>using System.Configuration;
>using System.Drawing;
>using System.Data.SqlClient;
>using System.Web;
>using System.Web.UI;
>using System.Web.UI.WebControls;

Are you sure that SMTPMailer isn't a third party product.
There's System.Web.Mail.SmtpMail in the framework - but no SmtpMailer.....