c# not going to destination on 0 hp

my script it is supposed to spawn an invisible portal on 0 playerhealth that takes me to dz_Default but nothing happens on 0 playerhealth

 /// 
 /// PlayerHealth.cs
 /// Display the players health in game
 /// 
 /// Attach this class to your player character
 /// 
 using UnityEngine;
 using System.Collections;
 
 public class PlayerHealth : MonoBehaviour {
 
     private const string DEFAULT_DROP_ZONE_NAME = "dz_Default";
     public GameObject destination;
     
     public int maxHealth = 100;
     public int curHealth = 100;
     
     
     
     public float healthBarLength;
 
     // Use this for initialization
     void Start () {
         healthBarLength = Screen.width / 2;
     }
     
     // Update is called once per frame
     void Update () {
         AddjustCurrentHealth(0);
     }
     
     void OnGUI() {
         GUI.Box(new Rect(10, 10, healthBarLength, 20), curHealth + "/" + maxHealth);
     }
     
     public void AddjustCurrentHealth(int adj) {
         curHealth += adj;
         
         if(curHealth < 0)
             curHealth = 0;
         
         if(curHealth > maxHealth)
             curHealth = maxHealth;
         
         if(maxHealth < 1)
             maxHealth = 1;
         
         if(curHealth <= 0)
 {
        
             destination = GameObject.Find( DEFAULT_DROP_ZONE_NAME );
             
 }
 
         healthBarLength = (Screen.width / 2) * (curHealth / (float)maxHealth);
 
     }
         public void OnTriggerEnter( Collider other ) {
         if( other.transform.CompareTag("Player") )
             other.transform.position = destination.transform.position;
         
     }    
         
 }