You need to add "A.AUX" as a virtual button to your "LIST" (as described in the Beo4 manual).
- Press "STANDBY" (red dot button) and "LIST" simultaneously.
(Beo4 display should display "ADD?" - if not - repeatedly press "LIST" till display is showing "ADD?")
- Press "GO"
- Press "LIST" repeatedly until "A.AUX" is displayed.
- Press "GO" - the Beo 4 should display "ADDED"
To select a function/source of your "LIST"
- Repeatedly press "LIST" until the desired function/source is displayed
- Press "GO" to send the command.