"Does not Implement Interface" error when trying to move UI

I'm trying to move a UI object whenever a player hovers over a different UI object. Here is my code.

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using UnityEngine.EventSystems;
4. using System.Collections;
5.  
6. public class CharacterBarMenu : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler{
7.  
8.     //bool CharacterBarIsHover;
9.  
10.     public GameObject CharacterBar;
11.     public GameObject CharacterBarOpened;  
12.     public GameObject CharacterBarClosed;
13.  
14.     public void OnPointerEnter (PointerEventData eventData)
15.     {
16.         Debug.Log ("Should Have Moved");
17.         CharacterBar.transform.position = CharacterBarOpened.transform.position;
18.     }
19.  
20.     public void OnPointerxit (PointerEventData eventData)
21.     {
22.         Debug.Log ("Should Have Moved");
23.         CharacterBar.transform.position = CharacterBarClosed.transform.position;
24.     }
25. }
26.  

I get the error

Anyone have any ideas?

 

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