SMTP SERVER Athentication Problem

This is a multi-part message in MIME format.
--
Dear Sir I am ready to send you the source code of My Program. Please check
that and run it as it does not appear to be any problem but access denied to
send from the SMTP server. Please did something for my favour i am really
thankful for that. Actually i have been due SERVLET Virtual UNIVERSITY from
my advisor and it have a part to send email notification to my Registered
Members. but when i tried simplest example but it doest not send that and
gives run time exception of access denied. Plz see on my code and suggest to
me that what to do by me. I am really thxful for that. Please gives me quick
response I am already to late.Thx
Tariq Mahmood





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--
import javax.mail.*;
import javax.activation.*;
import javax.mail.internet.*;
import java.util.*;

  /* A simple email sender class. */

public class EmailNotificatio
{

  public static void send(String smtpServer, String to, String from, String
subject, String body)
  {
    try
    {
      Properties props = System.getProperties();

      // -- Attaching to default Session, or we could start a new one --

      props.put("mail.smtp.host", smtpServer);
      Session session = Session.getDefaultInstance(props, null);


      // -- Create a new message --
      Message msg = new MimeMessage(session);

      // -- Set the FROM and TO fields --
      msg.setFrom(new InternetAddress(from));
      msg.setRecipients(Message.RecipientType.TO,
        InternetAddress.parse(to, false));

      // -- We could include CC recipients too --
      // if (cc != null)
      // msg.setRecipients(Message.RecipientType.CC
      // ,InternetAddress.parse(cc, false));

      // -- Set the subject and body text --
      msg.setSubject(subject);
      msg.setText(body);

      // -- Set some other header information --
      msg.setHeader("X-Mailer", "LOTONtechEmail");
      msg.setSentDate(new Date());

      // -- Send the message --
      Transport.send(msg);

      System.out.println("Message sent OK.");
    }
    catch (Exception ex)
    {
      ex.printStackTrace();
    }
  }



  public static void main(String args[])
  {
    try
    {
      String smtpServer=args[0];//smtp.wol.net.pk
      String to=args[1];
      String from=args[2];
      String subject=args[3];
      String body=args[4];
      send(smtpServer, to, from, subject, body);
    }

    catch (Exception ex)
    {
     System.out.println("Usage: java com.lotontech.mail.SimpleSender
smtpServer toAddress fromAddress subjectText bodyText");
     }

    System.exit(0);
  }

}