To all, I've found more errors during starting the jboss server, there are 3 services or modules that failed to be configure during startup. --- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM --- ObjectName: jboss:database=localDB,service=Hypersonic State: NOTYETINSTALLED Depends On Me: jboss.jca:name=DefaultDS,service=ManagedConnectionFactory ObjectName: jboss.j2ee:module=bank-ejb.jar,service=EjbModule State: FAILED Reason: org.jboss.deployment.DeploymentException: Error: can't find data sourc e: java:/DefaultDS; - nested throwable: (javax.naming.NameNotFoundException: Def aultDS not bound) ObjectName: jboss.j2ee:module=team-ejb.jar,service=EjbModule State: FAILED Reason: org.jboss.deployment.DeploymentException: Error: can't find data sourc e: java:/DefaultDS; - nested throwable: (javax.naming.NameNotFoundException: Def aultDS not bound) Seems like : 1) JNDI problems in bounding some resources 2) a DefaultDS is missing (but the getting document didn't say a thing on setting a default DS) 3) the nullPointerException in creating the EJBs (mostly because of the 1st 2 problems above; in which the related EJB JNDI entry is missing now) Any ideas on solving the problem? Or any guides I should read before reading the "Getting Start" document? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3970282#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...