I am trying to use jboss 4.0.4CR2 with the ejb3 option but at the moment
when I try to use an EntityManager from within my session bean the entity
manager is always null.

I have a stateless session bean where I load the entity manager:

@Stateless
public class CategorySessionBean implements CategoryView {
 @PersistenceContext(unitName = "inventPU")
 protected EntityManager manager;

...
 public load(){
 //HERE THE manager is NULL
 Query q = manager.createQuery("FROM Category");
 }
...
}

I am deploying the application in an ear with the following structure:
invent.ear

...|-META-INF
...|-META-INF|-application.xml
...|-invent.par
...|-invent.war

application.xml:

<application>
<display-name>invent</display-name>
<module>
<web>
<web-uri>invent.war</web-uri>
<context-root>/invent</context-root>
</web>
</module>
<module>
<ejb>invent.par</ejb>
</module>
</application>

invent.par:

...|-META-INF
...|-META-INF|-persistence.xml
...|-gr (the entity and session beans)

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence>
<persistence-unit name="inventPU">
<description> AEGEK invent pesrsistent unit</description>
<jta-data-source>java:/inventDS</jta-data-source>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLInnoDBDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create"/>
</properties>
</persistence-unit>
</persistence>

invent.war:
(jsp and other web related stuff)


HELP!
Thanx ...