Service implementing MessageCountListener not notified of new email arrival

I have implemented a service that returns incoming messages and implements the MessageCountListener interface for listening to new email messages. But when a new e-mail arrives, he does not receive a notification! What could be the reason and what else can be done? Here is the code:

public class EmailRetreiverService extends Service implements MessageCountListener{

public static final Vector v=new Vector();
public static final Vector nwmsg=new Vector();
Message[] m=null;
@Override
public IBinder onBind(Intent intent) {
    // TODO Auto-generated method stub
    return null;
}
@Override
public void onCreate(){
    Log.d("EmailRetreiverStarted"," ");

    ConvertToSmtp cts=new ConvertToSmtp("myemail@gmail.com","mypassword"," "," "," ", " ");
    Folder folder=cts.retreiveInbox();
    try {
        m=folder.getMessages();
    } catch (MessagingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    for(int i=0;i<m.length;i++){
        v.add(m[i]);

    }
    Log.d("EmailRetreiverMessageCount",new Integer(m.length).toString());
    Collections.reverse(v);
    /*folder.addMessageCountListener(new MessageCountAdapter(){  

        public void messagesAdded(MessageCountEvent ev) {  
            Log.d("MessageListener","message listner invoked.");  
            Message[] msgs = ev.getMessages(); 
            TTSservice.say("Attention! "+msgs.length+" new messages have arrived now.Kindly retreive inbox again!");
            Collections.reverse(v);
            for (int i = 0; i < msgs.length; i++) {

                v.add(msgs[i]);

            //System.out.println("Got " + msgs.length + " new messages");  
            }  
            Collections.reverse(v);
            // Just dump out the new messages  

        }

    });*/
    folder.addMessageCountListener(this);
}
@Override
public void onDestroy(){
    v.removeAllElements();
}
@Override
public void messagesAdded(MessageCountEvent arg0) {
    // TODO Auto-generated method stub
    Log.d("EmailService","MessageArrived!");
}
@Override
public void messagesRemoved(MessageCountEvent arg0) {
    // TODO Auto-generated method stub
    Log.d("EmailService","MessageRemoved!");
}

} It should be noted that the service successfully deletes the mailbox. But does not receive notifications.