Rig Transform doesn't move in animation

Hey, i have a problem with rigging. When i play my animation from animation panel it works how i needed.
But when animation is caused in game by animator, it simply doesn’t move my weapon(Rig Transform).
Also if i play other animation in animation panel in works fine, but when it again caused by animator, rig arms doesn’t follow the weapon at all.

Inverse Kinematics may help you with that Unity - Manual: Inverse Kinematics