When I pick the default 747 and go take off, I ENGAGE the autopilot with the following modes- V/S, ALT, ATHR, HDG. V/S is set to 1500, ALT is set to arm mode with the altitude window set to 27000, ATHR is set to 200knts and HDG is set to 165. FD is set to auto. I took off from Runway 16L at Seattle airport. Immediately after engaging the autopilot, the plane would start spinning and nosedive into the ground (this matter is for every plane including freeware planes from x plane.org.)
Can anyone help me?