UI Event System Question

Script:

 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.EventSystems;
 using System.Collections;
 
 public class _Slot : MonoBehaviour, ISelectHandler, IDeselectHandler, IPointerEnterHandler, IPointerExitHandler {
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     public void OnSelect (BaseEventData eventData) 
     {
         transform.FindChild ("Image").GetComponent <Image> ().color = new Color (255, 255, 255, 255);
     }
 
     public void OnDeselect (BaseEventData eventData)
     {
         transform.FindChild ("Image").GetComponent <Image> ().color = new Color (255, 255, 255, 50);
     }
 
     public void OnPointerEnter (PointerEventData eventData)
     {
         transform.FindChild ("Image").GetComponent <Image> ().color = new Color (255, 255, 255, 255);
     }
 
     public void OnPointerExit (PointerEventData eventData)
     {
         transform.FindChild ("Image").GetComponent <Image> ().color = new Color (255, 255, 255, 50);
     }
 }

The OnSelect and OnPointerEnter Change the Alpha Value fine.

The OnDeselect and OnPointerExit () Are called but do not change the image's Alpha value. Is there something I am doing wrong?