A problem about security when i run it

[yjyang]

I'm a new comer for the jaas.And This is my first tested example about Security.But when i run it ,it appeared the errors as follow:
[java] This is a bank!
[java] javax.naming.CommunicationException: Receive timed out. Root except
ion is java.net.SocketTimeoutException: Receive timed out
[java] at java.net.PlainDatagramSocketImpl.receive(Native Method)
[java] at java.net.DatagramSocket.receive(DatagramSocket.java:670)
[java] at org.jnp.interfaces.NamingContext.discoverServer(NamingContext
.java:1014)
[java] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:
1103)
[java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:47
0)
[java] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:46
3)
[java] at javax.naming.InitialContext.lookup(InitialContext.java:347)
[java] at banking.BankClient.main(BankClient.java:18)

PLease tell me what's wrong with it!Thanks
Do i need to modify some configuration files?

[petertje]

i guess you forget to set the jndi.properties
check the (free) quick-start documentation for an example