EJB 3 : stateful problem

[zzeuxis]

I'm trying to get a simple EJB 3.0 Stateful bean example working in JBoss.

I've managed to get my example working using Stateless EJB :
Simple Servet --> Stateless EJB --> retrieves some EJB Entity, saves a few bytes to the database and keeps a reference to the saved entity

When the EJB is declared with a @Stateless decoration, everything seams to be working as expected : I see my log message in EJB initialization displayed everytime a new client connects.
When I use @Stateful (which should be used since I want to maintain a reference to a session entity), I see that a new instance is created each time I access the EJB.

Any idea what can be wrong ? (I can post my entire code if needed)

[zzeuxis]

I forgot to mention I use (of course) Jboss 4.0.5 GA with the ejb3 profile selected from the installer

[zzeuxis]

My best guess is that it's the way I call my bean from my jsf backing bean that's wrong : here is what I do :

 // constructor
 public MyJSFBackingBean() {
 this.bindJndiRessources();
 }

 private void bindJndiRessources() {
 Context context;
 try {
 context = new InitialContext();
 String beanName = StatefullBean.class.getSimpleName() + "/local";
 System.out.println("binding bean " + beanName);
 this.myBean = (StatefullInterface) context.lookup(beanName);
 } catch (NamingException e) {
 e.printStackTrace();
 }
 }