Boy by the fisherman's hud

Can someone help me.
I have gone into the submarine and found the # 17,
I also have the code, I have been thrown out of the sub
I have gone back and forth to the boy by the fisherman's hud
and I still can't get Ariane to talk to the boy. What am I doing wrong?

did you atlk to the father? did you invite the boy to visit thesubmarine? did you send him back out ALONE?