I’m not at my FS computer right now, but strictly speaking, auto-rudder is not the same as auto-steering (nose wheel). If you look at the plane from the outside, you’ll be able to tell if the rudder moves when you the move the ailerons (roll axis). If it does, auto rudder works, and you have to look elsewhere for auto-steering, hopefully not in vain. Remember that you can assign the same buttons and axes to multiple functions.
/Henrik