ActiveMQ, topic does not bounce message - jms

Question

Imho the following code should create a new message, which is immedeatelly fetched again. But the output is zero. Why?
public static void main(String[] args) throws JMSException, NamingException {
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY,"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
props.setProperty(Context.PROVIDER_URL,"tcp://localhost:61616");
props.setProperty("topic.MyTopic", "FOO.BAR");
// create a new intial context, which loads from jndi.properties file
Context ctx = new InitialContext(props);
// lookup the connection factory
TopicConnectionFactory factory = (TopicConnectionFactory) ctx.lookup("ConnectionFactory");
// create a new TopicConnection for pub/sub messaging
TopicConnection conn = factory.createTopicConnection();
// lookup an existing topic
Topic mytopic = (Topic) ctx.lookup("MyTopic");
// create a new TopicSession for the client
TopicSession session = conn.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE);
// create a new publisher to produce messages
TopicPublisher publisher = session.createPublisher(mytopic);
// create a new subscriber to receive messages
TopicSubscriber subscriber = session.createSubscriber(mytopic);
subscriber.setMessageListener(new MessageListener() {
public void onMessage(Message msg) {
try {
TextMessage textMessage = (TextMessage) msg;
String txt = textMessage.getText();
System.out.println(txt);
} catch (JMSException e) {
e.printStackTrace();
}
}
});
TextMessage message = session.createTextMessage();
message.setText("Kebap: Pommes");
publisher.publish(message);
}

Answer 1

Okay, I found the problem. The example from the ActiveMQ website isn't that good ... but they also provide an answer for my problem.
http://activemq.apache.org/i-am-not-receiving-any-messages-what-is-wrong.html