ok here is the corrected .cfg file section for the autopilot. remember backup the .cfg before touching it. it saves headaches..

I used a 104 autopilot in mine but you could if you have panel maker use a boeing or airbus autopilot which is smaller.
[autopilot]
autopilot_available=1
use_no_default_bank =1
use_no_default_pitch =1
flight_director_available=1 // was 0
default_vertical_speed=1000
autothrottle_available=1 /// was 0
autothrottle_arming_required =1 //shift + r arms it
autothrottle_takeoff_ga =1
autothrottle_max_rpm =100.10 // was 90%
pitch_takeoff_ga=8
default_pitch_mode =0
default_bank_mode =0
max_pitch =10
max_pitch_acceleration =1
max_pitch_velocity_lo_alt =2
max_pitch_velocity_hi_alt =1.5
max_pitch_velocity_lo_alt_breakpoint =20000
max_pitch_velocity_hi_alt_breakpoint =28000
max_bank=25
max_bank_acceleration =1.8
max_bank_velocity =3
max_throttle_rate =0.1
nav_proportional_control =9
nav_integrator_control =0.25
nav_derivative_control =0
nav_integrator_boundary =2.5
nav_derivative_boundary =0
gs_proportional_control =9.52
gs_integrator_control =0.26
gs_derivative_control =0
gs_integrator_boundary =0.7
gs_derivative_boundary =0
yaw_damper_gain =0
here is a screen shot of the autopilot file and changes to the aircraft file we just clicking the advanced autopilot and autopilot settings, select all to 1. also scroll to the bottom and click flight director, change to 1 as well.

I hope this helps a little.