Problem with Spawning Script

Hi!

I have 3 objects as spawn medical kits. For each object is included that script:

Code (csharp):

1.  
2. using UnityEngine;
3.  
4. public class firstManager : MonoBehaviour
5. {
6.     public PlayerHealth playerHealth;
7.     public GameObject firstAid;
8.     public float spawnTime = 1f;
9.     public Transform[] spawnPoints;
10.     public bool exist = false;
11.  
12.    
13.     void Start ()
14.     {
15.             InvokeRepeating ("Spawn", spawnTime, spawnTime);
16.     }
17.  
18.    
19.     void Spawn ()
20.     {
21.                 if (playerHealth.currentHealth <= 0f)
22.                 {
23.                         return;
24.                 }
25.  
26.  
27.         if (exist != true)
28.         {
29.             int spawnPointIndex = Random.Range (0, spawnPoints.Length);
30.            
31.             Instantiate (firstAid, spawnPoints [spawnPointIndex].position, spawnPoints [spawnPointIndex].rotation);
32.             exist = true;
33.         }
34.            
35.  
36.                    
37.     }
38. }
39.  

And in a 'first aid kits' is attached that script:

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class FirstAidCapsuleRotator : MonoBehaviour {
6.  
7.     GameObject player;
8.     PlayerHealth playerHealth;
9.     bool playerInRange;
10.     public int howMuchHeal=20;
11.     GameObject firstAid;
12.  
13.  
14.     void Awake ()
15.     {
16.         player = GameObject.FindGameObjectWithTag ("Player");
17.         playerHealth = player.GetComponent <PlayerHealth> ();
18.         firstAid = GameObject.FindWithTag("firstAid");
19.     }
20.  
21.  
22.  
23.     void OnTriggerEnter (Collider other)
24.     {
25.         if(other.gameObject == player)
26.         {
27.             playerInRange = true;
28.         }
29.     }
30.  
31.     void OnTriggerExit (Collider other)
32.     {
33.         if(other.gameObject == player)
34.         {
35.             playerInRange = false;
36.         }
37.     }
38.  
39.     void Update ()
40.     {
41.  
42.  
43.         transform.Rotate (new Vector3 (20, 10, 0) * Time.deltaTime * 10);
44.  
45.         if(playerHealth.currentHealth < 100 && playerInRange)
46.         {
47.  
48.             Heal ();
49.  
50.         }
51.  
52.     }
53.  
54.     void Heal ()
55.     {
56.         if(playerHealth.currentHealth < 100)
57.         {
58.             playerHealth.Healed(howMuchHeal);
59.             Destroy (gameObject);
60.         }
61.         firstAid.GetComponent<firstManager> ().exist = false;
62.     }
63.  
64. }
65.  

Now work it so that a player will take a first aid kit, she disappears and spawns but in one and the same place. I want to spawn this medical kits at all spawn points. It is from 'Nightmare project' im still learning so i have a little problems with that. Could you help me?