UI text animation

Hello I have UI text and attachet animation to it not the animation controller just animation. And simple script that's have to play animation. But when i collide to it nothing happens. This is script

 #pragma strict
 var SweeperL : GameObject;
 var SweeperR : GameObject;
 var sideR : GameObject;
 var sideL : GameObject;
 var text : GameObject;
 sideR = GameObject.Find("SideR");
 sideL = GameObject.Find("SideL");
 SweeperL = GameObject.Find("SweeperL");
 SweeperR = GameObject.Find("SweeperR");
 text = GameObject.Find("TextR");
 
 function OnTriggerEnter2D (col : Collider2D) {
 if(col.tag == "Player"){
  SweeperL.transform.position.y = 24.7; //this works
  SweeperR.transform.position.y = -0.7;//this works
  sideR.animation.Play("fadeR");//this works
  sideL.animation.Play("fadeR2");//this works
  text.animation.Play("leftsht");//this doesn't works!!!
  }
  }
 
 

animaton is legacy!!!