Cannot delay player respawn.

Hello, I am using this script for my game in order to respawn when I die but when I try to delay the respawn with yield nothing happens. Can anyone help me ?

 using UnityEngine;
  using System.Collections;

   public class HealthScript : MonoBehaviour {



     public int hp = 1;
     
     
     public bool isEnemy = true;
     
     
     public void Damage(int damageCount)
     {
 

         hp -= damageCount;
         
         if (hp <= 0)
         {
         // 'Splosion!
         SpecialEffectsHelper.Instance.Explosion(transform.position);
         SoundEffectsHelper.Instance.MakeExplosionSound();
     
             // Dead!
             Destroy(gameObject);
         StartCoroutine(RestartLevel());


         }
     }
 IEnumerator RestartLevel(){

     yield return new WaitForSeconds(2);

     Application.LoadLevel(Application.loadedLevel);

 } 


     
     void OnTriggerEnter2D(Collider2D otherCollider)
     {
     // Is this a shot?
     BulletScript1 shot = otherCollider.gameObject.GetComponent<BulletScript1> ();
     if (shot != null) {
         // Avoid friendly fire
         if (shot.isEnemyShot != isEnemy) {
             Damage (shot.damage);
                 
             // Destroy the shot
             Destroy (shot.gameObject); 
         }
     }
 }

     }