Thank you Pharan for you answer!
Yes i'm using playmaker and Mecanim. To be honest, i'm using this tools because i'm graphist, not developer ( and french, sorry for my english...).
ok for animation window, i understand.
But normally iddle (on my screen upper) could be play on game view. And it's not. I don't understand. I think it's not playmaker because iddle must be play when i don't give direction control to my character.
But when i put iddle (loop) in animation name ( in skeleton animation script), animation play. But i'm interest to control my different animations (to pass between iddle/run/attack/etc.
Do you think there is a solution with mecanim.
I'm thinking, i checked preview aim in my skeleton-controller and there is nothing: "no model for preview". Unity bug? or not it's my fault