Why isn't my animation being played?

The animation works fine with my C# code, but it doesn't play when I try to trigger it from the JS code.

JS Code (where the animations doesn't play):

 #pragma strict
 var speed : float = 10.0;
 internal var anim : Animator;
 var rotation: GameObject;
 var x : float;
 var z : float;
 var angle : float;
 
 function Start() {
     anim = GameObject.Find("Pernas").GetComponent(Animator) as Animator;
 }
 
 function Update () {
         // Arrows or WASD
         x = Input.GetAxis("Horizontal") * Time.deltaTime * speed;
         z = Input.GetAxis("Vertical") * Time.deltaTime * speed;
              
         // Animations
         if (Mathf.Abs(x) > 0.1 || Mathf.Abs(z) > 0.1) anim.SetBool("walk", true);
         else anim.SetBool("walk", false);
             
         // Rotation based on mouse position
         var playerPlane = new Plane(Vector3.up, transform.position);
         var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         var hitdist = 0.0;
         if (playerPlane.Raycast (ray, hitdist)) {
             var targetPoint = ray.GetPoint(hitdist);
             var targetRotation = Quaternion.LookRotation(targetPoint - gRotacao.transform.position);
             rotation.transform.rotation = Quaternion.Slerp(rotation.transform.rotation, targetRotation, speed * Time.deltaTime);
         }
             
         // Apply the player's movement
         transform.Translate(x, 0, z);
     }
 } // Update

   

C# Code (working fine):

 using UnityEngine;
 using System.Collections;
 
 public class Joystick : MonoBehaviour
 {
     public GameObject gJoystick;
     public CNAbstractController MovementJoystick;
     public Animator anim;
     public float speed;
     public float x;
     public float z;
 
     private void Start() {
         anim = GameObject.Find("Pernas").GetComponent<Animator>();
     }
     private void Update() {
         // Receive the joystick's values
         x = MovementJoystick.GetAxis("Horizontal") * Time.deltaTime * speed;
         z = MovementJoystick.GetAxis("Vertical") * Time.deltaTime * speed;
 
         // Animations
         if (Mathf.Abs(x) > 0.1 || Mathf.Abs(z) > 0.1) anim.SetBool("walk", true);
         else anim.SetBool("walk", false);
 
         // Apply player's movement
         transform.Translate(x, 0, z);
     }
 }

I've tried so many things that I'm starting to think it's an Unity bug.

Thanks for any help!