[java] non riesco ad autenticarmi su jabber

[afsdfdlecosdfsfdcco]

Sto provando ad autenticarmi su jabber usando la libreria SMACK ma ho subito un problema. Intanto questo è il codice:

import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smack.packet.Presence;

public class Main
{
public static void main(String[] args)
{
XMPPConnection conn = new XMPPConnection("jabber.freenet.de");

try
{
conn.connect();
conn.login("alessandro.cocco@jabber.freenet.de", mia_password);
}
catch (XMPPException ex)
{
System.out.println("Exception: " + ex);
ex.printStackTrace();
return;
}

}

}


Username e password sono corretti ma ottengo sempre "autentificazione fallita":

SASL authentication failed:
at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:209)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:341)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:301)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:283)
at Main.main(Main.java:19)

Perche'?

grazie