i got a big problem with animation tree in Unity

Im asking you guys for a help, i have a big problem in my animation tree, i put a animation called "Idle", also i put animation called "charge" i connect them with transitions , when i'm running my game at begin all is good, but when i move my character to right or left, animation change from idle to charge, and when i stop charge animation dont change to idle animation, can some body tell me why ? :/