Problems with power up

I'm trying to make a shield power up. I got it all working but it seems that my player is still losing health.

Here's my player health script: using UnityEngine; using UnityEngine.UI; using System.Collections;

public class PlayerHealth : MonoBehaviour {

 public float curHealth;
 public float maxHealth;
 public float amount;

 public GameObject playerExplosion;
 public GameObject playerHit;

 public Text healthText;

 private Done_GameController gameController;

 // Use this for initialization
 void Start () 
 {
     healthText.text = "Health: " + curHealth;
     curHealth = 3;
     maxHealth = 3;
     amount = 1;

     curHealth = maxHealth;
     GameObject gameControllerObject = GameObject.FindGameObjectWithTag ("GameController");
     if (gameControllerObject != null)
     {
         gameController = gameControllerObject.GetComponent <Done_GameController>();
     }
     if (gameController == null)
     {
         Debug.Log ("Cannot find 'GameController' script");
     }
     
 }

 void Update()
 {

 }

 void OnTriggerEnter (Collider other)
 {
     if (other.tag == "Enemy")
     {    
         if (curHealth <= maxHealth)
         {
             Instantiate(playerHit, other.transform.position, other.transform.rotation);
             curHealth -= amount;
             healthText.text = "Health: " + curHealth;
         }

         if (curHealth <= 0)
         {
             curHealth = 0;
             Dead();
             Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
         }
 
     }


     
 }
 public void Dead()
 {
     gameController.GameOver();
     Destroy(gameObject);
 }

}

here's my shield script:

 using UnityEngine;
 using System.Collections;
 
 public class Shield : MonoBehaviour {
 
     public GameObject shield;
     public bool forceActive = false;
 
     public void ActivateShield()
     {
         StartCoroutine (CreateForceField());
     }
     
     IEnumerator CreateForceField ()
     {
         if (forceActive) 
         {
             yield break;
         }
         forceActive = true;
         shield.SetActive (true);
         yield return new WaitForSeconds (5.0f);
         shield.SetActive (false);
         forceActive = false;
         
     }
     
 }
 

and here's my shieldUPS if the player collide, he will have shield

 using UnityEngine;
 using System.Collections;
 
 public class ShieldUPS : MonoBehaviour {
 
     public Shield shield;
     
     void Start () {
         
         shield = shield.GetComponentInChildren<Shield>();
     }
     
     void OnTriggerEnter(Collider other)
     {
         if (other.tag == "ShieldUPS")
         {
             shield.ActivateShield();
             Destroy (other.gameObject);
         }
     }
 }
 

I also drag the shield to the player so the shield will follow the player, if i remove the shield from the player object, the shield works. Any help would be appreciate.