I everybody i´m trying to implementing a simple send receive example and when i try to start the sender i got this error on jboss

C:\SADSXPJAVA\JMS\bin>java -classpath .;c:\jboss-3.2.1\client\jbossall-client.jar MessageSender

javax.naming.CommunicationException: Receive timed out. Root exception is java.
net.SocketTimeoutException: Receive timed out
at java.net.PlainDatagramSocketImpl.receive(Native Method)
at java.net.DatagramSocket.receive(DatagramSocket.java:671)
at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:10
38)
at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1127)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:478)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:471)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at MessageSender.(MessageSender.java:25)
at MessageSender.main(MessageSender.java:9)


please help me