The message could not be sent to the SMTP server. The transport error code was 0x80040217. The server response was not available

Please help me I am using this script..

Found the full code Here

 public void sendemail(int MemberId, DataTable Member, int rowNo)
    {
        MailMessage msgMail = new MailMessage();

        msgMail.To = Member.Rows[rowNo]["EmailID"].ToString();
        msgMail.From = "admin@auditionbollywood.com"; 
        msgMail.Subject = "Auditions BollyWood Account Expire";
        msgMail.BodyFormat = MailFormat.Text;
        StringBuilder sb = new StringBuilder();
        sb.AppendFormat("Hi !\n\n");
        sb.AppendFormat("Your Audition Bollywood Account has been expired.Please pay the payment for activation.\n");
        sb.AppendFormat("Click the below link to pay to activate your account\n");
        string link = string.Format("http://www.auditionbollywood.com/paymentrenewal.aspx?MemberId={0}", MemberId.ToString());
        sb.Append(link);
        sb.AppendFormat("\n\nThank You");
        msgMail.Body = sb.ToString();
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "mail.auditionbollywood.com");
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 587);
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", 2);
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "admin@auditionbollywood.com");
        msgMail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "**********");
        SmtpMail.SmtpServer = "mail.auditionbollywood.com";
        SmtpMail.Send(msgMail);
    }

The symbolic name for error code 0x80040217 is CDO_E_LOGON_FAILURE which has the following description:

The transport was unable to log on to the server.

You need to provide valid credentials to send using that SMTP server.