Hi vickyk, and thanks for your answer. Ok for the first question ! For the second instead i attach you the part of the stacktrace above the error that i've past yesterday 2008-02-29 00:00:36,823 INFO [org.jboss.resource.connectionmanager.TxConnectionManager] Starting 2008-02-29 00:00:36,835 INFO [org.jboss.security.plugins.JaasSecurityManagerService] Created securityMgr=org.jboss.security. plugins.JaasSecurityManager@196bac4 2008-02-29 00:00:36,836 INFO [org.jboss.security.plugins.JaasSecurityManagerService] setCachePolicy, c=org.jboss.util.TimedC achePolicy@bfd10a 2008-02-29 00:00:36,836 INFO [org.jboss.security.plugins.JaasSecurityManagerService] Added HsqlDbRealm, org.jboss.security.p lugins.SecurityDomainContext@1352367 to map 2008-02-29 00:00:36,843 INFO [org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.DefaultDS] Bound connectio n factory for resource adapter for ConnectionManager 'jboss.jca:service=LocalTxCM,name=DefaultDS to JNDI name 'java:/DefaultD S' 2008-02-29 00:00:36,843 INFO [org.jboss.resource.connectionmanager.TxConnectionManager] Started 2008-02-29 00:00:36,843 INFO [org.jboss.mq.pm.jdbc2.PersistenceManager] Starting ...and so, the error is in the defaultds,right ?? and not in my oracle-ds ?? I don't use hypersonic ! Thanks Davide View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133114#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...