Hi.
I'm using EJB-3.0_Previous_3, JBoss-4.0.1sp1, JBossIDE-1.5-Preview-jre1.5-ALL and Eclipse 3.1M5a under WIN2000.
(I followed the install instructions.)
When I was trying to run the 'stateless' example of your tutorial the following exceptions occur when running the client:
Exception in thread "main" javax.naming.CommunicationException [Root exception is java.io.InvalidClassException: org.jboss.ejb3.remoting.BaseRemoteProxy; local class incompatible: stream classdesc serialVersionUID = -1019635950408433617, local class serialVersionUID = -2289426881135628080]
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:663)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at org.jboss.tutorial.stateless.client.Client.main(Client.java:19)
Caused by: java.io.InvalidClassException: org.jboss.ejb3.remoting.BaseRemoteProxy; local class incompatible: stream classdesc serialVersionUID = -1019635950408433617, local class serialVersionUID = -2289426881135628080
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:519)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1546)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1460)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1693)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1912)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1836)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339)
at java.rmi.MarshalledObject.get(MarshalledObject.java:135)
at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:51)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:566)
... 3 more
JBoss IDE has old version of EJB3 within it. Not sure how to fix. You'll need to post on the JBoss IDE user list