Good morning to all, I'm using iReport 3.0.0, without problems im my Application. But now I'd like to upgrade to use the iReport 3.5.1, but I can't run in this version. when I configure, same configurarion with the iReport 3.0.0, the log show me : java.lang.IllegalAccessError: tried to access method org.hibernate.engine.CascadeStyle.<init>()V from class org.hibernate.engine.EJB3CascadeStyle$1 at org.hibernate.engine.EJB3CascadeStyle$1.<init>(EJB3CascadeStyle.java:24) at org.hibernate.engine.EJB3CascadeStyle.<clinit>(EJB3CascadeStyle.java:19) at org.hibernate.ejb.event.EJB3PersistEventListener.<clinit>(EJB3PersistEventListener.java:19) at org.hibernate.ejb.EventListenerConfigurator.<init>(EventListenerConfigurator.java:81) at org.hibernate.ejb.Ejb3Configuration.<init>(Ejb3Configuration.java:136) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:124) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52) at com.jaspersoft.ireport.designer.connection.EJBQLConnection.getEntityManager(EJBQLConnection.java:138) at com.jaspersoft.ireport.designer.connection.EJBQLConnection$1.run(EJBQLConnection.java:188) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) I tried to add de .jar files of the application in the Classpath, in the lib into the iReport, and the errors continues. Can anyone help me? regards Rafael Felix da Silva