Hi, You need to configure a persistence.xml file and then pack it in the META-INF dir of the ejb jar. The persistence.xml will look somethjing like so: <?xml version="1.0" encoding="UTF-8"?> | <persistence> | <persistence-unit name="myPU"> | <jta-data-source>java:/<you firebird ds name></jta-data-source> | <class><managed class name></class> | <properties> | <property name="hibernate.dialect" value="org.hibernate.dialect.FirebirdDialect"/> | <property name="hibernate.hbm2ddl.auto" value="create-drop"/> | </properties> | </persistence-unit> | </persistence> You can then inject an EntityManager with the @PersistenceContext annotation within a Session bean. Cheers, Andy View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4007885#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...