Today a coworker has struggled to give a listener service to a database, but the order does not matter, sometimes It gives these problems. We reviewed more quickly once recommended by Oracle to start the basic components order. also we should note that the listener should be used with “Dynamic Register” this is that the database will search the listener (this makes the pMON), formerly it was used what is called “Static Register” in which the listener look for the database.
– Database control or Enterprise Manager EM.
– Listener – Listener Scan.
HTH – Antonio NAVARRO