为什么我的Animator播放不能

这是代码：
using UnityEngine;
using System.Collections;
public class Move : MonoBehaviour
{
Rigidbody rig;
private int CanJump = 1;
private Animator ator;
void Start()
{
rig = this.GetComponent<Rigidbody>();
ator = this.GetComponent<Animator>();
ator.Stop();
}
void Update()
{
Vector3 velPlayer = this.rig.velocity;
if (Input.GetKey(KeyCode.D))
{
rig.velocity = new Vector3(5, velPlayer.y, velPlayer.z);
}
if (Input.GetKey(KeyCode.A))
{
rig.velocity = new Vector3(-5, velPlayer.y, velPlayer.z);
}
if (Input.GetKeyDown(KeyCode.W) && CanJump == 1)
{
rig.velocity = new Vector3(velPlayer.x, 6, velPlayer.z);
CanJump = 2;
}
if (Input.GetKeyUp(KeyCode.W) && CanJump == 2)
{
CanJump = 3;
}
if (Input.GetKeyDown(KeyCode.W)&& CanJump ==3)
{
ator.Play("Jump"); // 这个代码没效果，理论上我跳跃两次应该同时播放一个动画，却没效
rig.velocity = new Vector3(velPlayer.x, 4, velPlayer.z);
CanJump = 0;
}
}
void OnTriggerEnter(Collider other)
{
if (other.tag == "flood")
{
CanJump = 1;
}
}
}


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希望各位大佬帮帮忙，萌新查了好久资料拉，根本没有人遇到相同的问题啊。。。。
就是上面 ,play("Jump")不能播放一段动画
圣典也没有查到有关的资料，求大佬啊！！！