I've been trying to use GoFlight MCPPro and EFIS with PMDG Boeing 737 using PMDG interface. Everythings apears to be working well but, after takeoff, I don't succed in conecting A/P Engage.Would it be a personal problem or a PMDG interface problem?Jose Mansilha

I don't know anything about your hardware, but A/P Engage problems after takeoff is usually due to not having the alternators on-line. Check the overhead panel.