Tks Jack! Really sounds strange!
The battery is OK, and is strong enoufh to turn the starter that was turning without turn the flywheel! In one of the first time that it happens I have broke the return spring bolt of the starter... and the flywheel dosen't move.
When I put the prybar in the crankshaft, I try to turn, it was very stuck.... and after several turns, it start to come spin easely.