I am having trouble using byteman, the rule seems to load, but simply won't fire AS7 startup log 17:08:31,523 INFO [org.jboss.ws.common.management.AbstractServerConfig] (MSC service thread 1-5) JBoss Web Services - Stack CXF Server 4.0.4.GA-redhat-1 17:08:31,638 INFO [org.apache.coyote.http11.Http11Protocol] (MSC service thread 1-3) Starting Coyote HTTP/1.1 on http-/127.0.0.1:8080 17:08:31,785 INFO [stdout] (MSC service thread 1-5) org.jboss.byteman.agent.Transformer : possible trigger for rule Set URLDelimiter in class org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory 17:08:31,812 INFO [stdout] (MSC service thread 1-5) RuleTriggerMethodAdapter.injectTriggerPoint : inserting trigger into org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory.initSelector() void for rule Set URLDelimiter 17:08:31,833 INFO [stdout] (MSC service thread 1-5) org.jboss.byteman.agent.Transformer : inserted trigger for Set URLDelimiter in class org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory test1.btm (rule) RULE Set URLDelimiter CLASS org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory METHOD initSelector AT ENTRY IF true DO traceln("************************************************") ENDRULE When I configure and test a XA datasource, nothing gets printed? Regards