Austrian Airliner wrote on Feb 20^th, 2009 at 9:26pm:

Hallo!!! I've got a question. How could i start the autopilot-functions (HDG, ALT, V/S, CMD 1,2,3)? I've tried all knobs but nothing happend. The only thing wich works is the SPD knob, and the EPR knob.  :-[ Thank you very much Airforce one

Have you aligned the things at the top left of the overhead panel, once the light has gone off, turn all three of them to NAV.