Hello
I am the new of Message Driven Bean in EJB 3.0. And I try to create a first example of Message Driven Bean in EJB 3.0, but it has an error of:

java.lang.ClassCastException: javax.naming.Reference
at MDBTestClient.main(MDBTestClient.java:21)

My Codes are below:
MDB.java
package mdb;

import javax.ejb.MessageDriven;
import javax.ejb.ActivationConfigProperty;
import javax.jms.MessageListener;
import javax.jms.Message;

@MessageDriven(activationConfig =
{
@ActivationConfigProperty(propertyName="destinationType",
propertyValue="javax.jms.Queue"),
@ActivationConfigProperty(propertyName="destination",
propertyValue="queue/mdb")
})
public class MDB implements MessageListener {

public void onMessage (Message msg) {
System.out.print("Got Message");
}

}

TestClient
import java.util.Properties;

import javax.jms.QueueConnection;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.Queue;
import javax.jms.QueueConnectionFactory;
import javax.jms.TextMessage;
import javax.naming.InitialContext;

public class MDBTestClient {
private static QueueConnectionFactory factory=null;
//private static Queue queue=null;
private static QueueConnection cnn=null;
private static QueueSender sender=null;
private static QueueSession sess=null;

public static void main(String args[]) {
try{
InitialContext ctx=new InitialContext();
Queue queue=(javax.jms.Queue)ctx.lookup("queue/mdb");
factory=(QueueConnectionFactory)ctx.lookup("ConnectionFactory");
cnn=factory.createQueueConnection();
sess=cnn.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
TextMessage txt=sess.createTextMessage("Hello My First MDB");
txt.setLongProperty("send", System.currentTimeMillis());
sender=sess.createSender(queue);
sender.send(txt);
sess.close();

}
catch(Exception e){
e.printStackTrace();
}
}
}

please help me on this.
Thanks all of you in advance.