Animation.play not working on button

I have an animation clip that moves buttons about, then I want it to play on a button press. I have this script at the moment, but nothing happens, no errors.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class toShopAnim : MonoBehaviour {
5.    
6.     public Animation anim;
7.  
8.     void Start(){
9.         anim = GetComponent<Animation>();
10.         }
11.  
12.     public void shopButton(){
13.         anim.Play ("toShop", PlayMode.StopAll);
14.     }
15. }
16.