Hi, i already read this tutorial from here and i have download all required libraries (Log4j, JavaMail API ,Activation framework) . But when i trying running this program i got this error

log4j:WARN No appenders could be found for logger (org.codemonkey.vesijama.Mailer). org.codemonkey.vesijama.MailException: Generic error: Exception reading response log4j:WARN Please initialize the log4j system properly.

this is the source code i use

import javax.mail.Message.RecipientType;
import org.codemonkey.vesijama.Email;
import org.codemonkey.vesijama.MailException;
import org.codemonkey.vesijama.Mailer;
public class testSend {
final Email email = new Email();
public testSend{
 try{
    email.setFromAddress("test", "[email protected]");
    email.setSubject("hey");
    email.addRecipient("hai", "[email protected]", RecipientType.TO);
    email.setText("We should meet up!");
    email.setTextHTML("<b>We should meet up!</b>");
    new Mailer("smtp.gmail.com", 465, "[email protected]", "XXXXXX").sendMail(email);
    }
        catch(MailException me)
        {
            System.out.println(me);
        }
}
}

i have also trying using port 587. but i got same error >.<

btw , it say can add attachments what should i write if i want to attach .xls ( microsoft excel 2003) ?

Thx B4.