Raycast hit problem [ANDROID]

Hi,

I am making 2D android game and I have problem with raycast... When the ball pick up green diamond Button is enabled and if you press button it should close the box for 4 seconds, but if I touch button with my finger nothing happens and if I press button with my mouse everything works fine.... I tried with EventSystems but still nothing....

here are my scripts:

"Script for Enable side so ball can get out"

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class Sides : MonoBehaviour {
 
     public GameObject Top, Bottom, Right, Left;
 
     // Use this for initialization
     void Start () {
     
     }
 
     void Update (){
             Vector2 test = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
                 if (Input.GetTouch(0).phase == TouchPhase.Began){
                 test = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
 
                         if(Physics2D.Raycast(test, (Input.GetTouch(0).position)).collider.tag == "Top"){
                             Top.gameObject.SetActive (true);
                         }
                         if(Physics2D.Raycast(test, (Input.GetTouch(0).position)).collider.tag == "Bottom"){
                             Bottom.gameObject.SetActive (true);
                         }
                         if(Physics2D.Raycast(test, (Input.GetTouch(0).position)).collider.tag == "Right"){
                             Right.gameObject.SetActive (true);
                         }
                         if(Physics2D.Raycast(test, (Input.GetTouch(0).position)).collider.tag == "Left"){
                             Left.gameObject.SetActive (true);
                         }
                     
             if (Input.GetTouch (0).phase == TouchPhase.Ended) {
                 Top.gameObject.SetActive (false);
                 Bottom.gameObject.SetActive (false);
                 Right.gameObject.SetActive (false);
                 Left.gameObject.SetActive (false);
             }
         }
     }
 }

"Script for Button"

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class EnableButton : MonoBehaviour {
 
     public GameObject[] block;
     public Button enab;
 
     void Start () {
     
     }
     
 
     void Update () {
     
     }
 
     public void Enable(){
         enab.gameObject.SetActive (false);
             foreach (GameObject blocks in block) {
                 blocks.gameObject.SetActive (true);
         }
         StartCoroutine (Disable ());
     }
 
     IEnumerator Disable(){
         yield return new WaitForSeconds (4);
         foreach (GameObject blocks in block) {
             blocks.gameObject.SetActive (false);
         }
     }
 }