CHAT no Midlet

<blockquote>java.io.IOException: Cannot listen on client connection

at com.sun.midp.io.j2me.sms.Protocol.setMessageListener(+34)

at src.Receiving.startApp(+39)

at javax.microedition.midlet.MIDletProxy.startApp(+7)

at com.sun.midp.midlet.Scheduler.schedule(+270)

at com.sun.midp.main.Main.runLocalClass(+28 )

at com.sun.midp.main.Main.main(+116)</blockquote>

public class Receiving extends MIDlet
    implements CommandListener, Runnable, MessageListener {
...
...
...
...

 try {
                smsconn = (MessageConnection) Connector.open(smsConnection);
                smsconn.setMessageListener(this);
            } catch (IOException ioe) {
                ioe.printStackTrace();
                System.out.println("EXCEÇAOOOOOOOOO");
            }