CFS3 Gunner and Pilot stations

Can anyone help me with getting my CFS3 bombers to fly straight and narrow without my help when I switch to gunnery stations? Whenever i switch the bombers fly downwards. And why does all the bombers fly upward when I man the pilots seats even when I point he nose downwards? As I fly the bombers and switch to gunnery stations the pilot in control flies like a drunk monkey and sends the plane downwards. Can anyone help me in this regard because Ive re-installed the game twice with no effect.