Walk animation for camera isn't playing

So I'm trying to make a walk effect to the camera when I press either W or S, but it dosen't really work. Here is my script, is there anything wrong here?

 var Player : GameObject;
 
 
 function Update () {
 
 if(Input.GetKey("w")){
 
     Player.animation.Play("Walk");
 
     }
     
     
     if(!Input.GetKey("w")){
 
     Player.animation.Stop("Walk");
 
     }
     
     if(Input.GetKey("s")){
 
     Player.animation.Play("Walk");
 
     }
     
     
     if(!Input.GetKey("s")){
 
     Player.animation.Stop("Walk");
 
     }
     
     
     
 }