Mark,
 After t/o I establish a positive climb rate.....then I activate ail and elev switches then hdg select...I use the ap turn and switch controller during climb also.....My problem is after leveling off and I want to climb or descend the ap turn and switch does not work I get no pitch movement either up or down when I click on the pitch controller....I have to use the trim on the yoke....this is when i use ver 2.4....when i use ver 2.2 on the 727-100 there are no problems

thanx
Ed