I'm having a hard time upgrading from seam 1.2.1 to seam 2.0.1.CR1. I saw that there is a new version of Embedded JBoss and decided it is now or never for the upgrade. I followed all the instructions on the wiki. I'm using a Postrgres DB, so I created a postgress-ds.xml file and copied to the deploy dir. However, I get a java.lang.ClassCastException: com.arjuna.ats.jbossatx.jta.TransactionManagerDelegate cannot be cast to javax.transaction.TransactionManager exception. I'm new to jboss configuration, so maybe I'm missing a file (maybe need to delete a file) or configuration? can somebody please point me on the right direction? Here is my ds configuration: <local-tx-datasource> <jndi-name>PostgresDS</jndi-name> <connection-url>jdbc:postgresql://localhost/beta_xxx</connection-url> <driver-class>org.postgresql.Driver</driver-class> <user-name>genie</user-name> genie4.0 </local-tx-datasource> And the stack trace: java.lang.ClassCastException: com.arjuna.ats.jbossatx.jta.TransactionManagerDelegate cannot be cast to javax.transaction.TransactionManager at org.hibernate.transaction.JNDITransactionManagerLookup.getTransactionManager(JNDITransactionManagerLookup.java:23) at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:325) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915) at org.jboss.seam.persistence.HibernateSessionFactory.createSessionFactory(HibernateSessionFactory.java:165) at org.jboss.seam.persistence.HibernateSessionFactory.startup(HibernateSessionFactory.java:79) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:125) at org.jboss.seam.Component.callComponentMethod(Component.java:2082) at org.jboss.seam.Component.callCreateMethod(Component.java:2005) at org.jboss.seam.Component.newInstance(Component.java:1976) at org.jboss.seam.contexts.Contexts.startup(Contexts.java:304) at org.jboss.seam.contexts.Contexts.startup(Contexts.java:278) at org.jboss.seam.contexts.ServletLifecycle.endInitialization(ServletLifecycle.java:95) at org.jboss.seam.init.Initialization.init(Initialization.java:573) at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:34) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3830) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4337) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4123879#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...