Guys,
Thanks for any help you can give me. For whatever reason my autopilot altitude hold button and VNAV will not engage (heading hold, autothrotttle, etc all work). I have searched the forums and have disabled plugins (Groundhandling, XUIPC), moved the null zone to the far right, etc...and nothing seems to work. Can anyone point me in the right direction. I have looked everywhere here for a solution before i posted this so my apologies if it is something very small i am not doing.