I cant get my animation to trigger.

So I have an empty game object with a box collider with is trigger checked and the script attached, a child of that is the object I have animated (a gate sliding across). As it stands when the player walks into the collider nothing happens and the console gives these 2 errors: Invalid Layer Index '-1' UnityEngine.Animator:Play(String)

and

Animator.GotoState: State could not be found UnityEngine.Animator:Play(String)

My js is:

 #pragma strict
 
 var Floor_Gate : GameObject; //The name of the animated object
 
 function OnTriggerEnter(Other : Collider){
  
     if(Other.gameObject.tag == "Player"){
         Floor_Gate.GetComponent.<Animator>().Play("FloorGate");
     }
 }