Destroy gameObject not working?

 var maximumHitPoints = 100.0;
 var hitPoints = 100.0;
 var deadReplacement : Rigidbody;
 var GOPos : GameObject;
 private var scoreManager : ScoreManager;
 
 function Start(){
 
     var GO = gameObject.FindWithTag("ScoreManager");
     scoreManager = GO.GetComponent("ScoreManager");
 }
 
 function ApplyDamage (damage : float) {
     if (hitPoints <= 0.0)
         return;
 
     // Apply damage
     hitPoints -= damage;
     scoreManager.DrawCrosshair();
     // Are we dead?
     if (hitPoints <= 0.0)
         Replace(); 
 }
 
 function Replace() {
  
     // If we have a dead barrel then replace ourselves with it!
     if (deadReplacement) {
         var dead : Rigidbody = Instantiate(deadReplacement, GOPos.transform.position, GOPos.transform.rotation);
         scoreManager.addScore(100);
         // For better effect we assign the same velocity to the exploded barrel
         dead.rigidbody.velocity = rigidbody.velocity;
         dead.angularVelocity = rigidbody.angularVelocity;
     }
     // Destroy ourselves
     Debug.Log("Calling destroy for " + gameObject);
     Destroy(gameObject);
 }