i recently purchased captain sims boeing 767-300 and a 200 pack. its a fantastic aircraft but i cant seem to get the autopilot to work

ive tried a lot of things, even using the hotkeys but unfortunatly it just doesnt seem to work in the VC. i can get the speed holder to work but that is as far as it goes. if anybody has this aircraft please let me know if youve had the problem and know how to fix it.
Thanks
Stang