Can't Check If Animatorstate Is In Second Layer

I have a second animation layer which is only masked to the arms of the player.

Now I would like to check if the animator is in a certain state in this second layer.

 function IsWeaponDrawing() : boolean {
     if( myAnimatorInfo.nameHash == myAnimator.StringToHash("Arms.sheat_sword") ){
         Debug.Log("sheat sword");
         return true;
     }else
         return false;
 }

But this doesn't work and I have no clue why not. "Arms" is the name of my second layer, "sheat_sword" the name of the animation state.

The "Arms" layer has blending mode set to override with a weight of 0.95.

Any clues?