While he is on the controls and climbing. Ask him what the airplane is doing. Wait and listen for his answer. If he acknowledges the climb tell him to lower the nose. If he can lower the nose and know the airplane is in a climb it is simply a sensitivity thing.

If the airplane is in a climb and he says it is in level flight then you have a bit of a problem. We have a gentleman here at our field who has been in training for over a year and he has periphial problems.

I fear this may be the problem your guy has as well.

If he understands what the airplane is doing, do not be afraid to reach under his thumb and push a little. Explain to him what you are doing and see if he can get a feel. He may have a fear of the airplane nose diving while in flight. If this is the case when it is trimmed for straight and level. Have him remove his right hand from the stick for a moment and let him see you do the same. THis will let him know the plane can fly "hands off". Might be all he needs.

Wish you the best. Keep us informed of his progress.

Glenn