A question/problem about oracle "tns listener" and "enterprise manager"

hi,
I have

  • an IBM P550 machine,
  • an AIX 5.3 running on it and
  • an oracle database, already installed on it.

The problem (or question of my own) is:
Oracle tns listener, "CT_LISTENER", and the enterprise manager (EM) of the instance, which is uniq instance and called "CALLTAKER", does not start at the startup. So, I need to start the tnslistener and the EM at every startup with an ssh connection.

Is there any way of setting some parameters to start the listener and the EM automaticaly at the startup?

thank you very much for your vauable responses,
talip.