hi alli try to use 737 ng with the new squawkbox 3 on vatsim and each time i try to arm AT before take off it definitely stays off. theres an alarm blinking "AT prst" and i dont know what to do . Of course i can still have the auto pilot on but without speed control.i installed last fsuipc in modules recently.thanks for helpingJP:(

Read manual and turn on engine driven generators.Man, I think I could count at least 100 exactly the same questions.