Dealing damage problem

I have 3 scripts that is supposed to deal damage to my enemy (for melee combat). And also both the player and the enemy has the "Stats" script attached to them because i want this to be multiplayer at a later stage. This is the first script:

 using UnityEngine;
 using System.Collections;
 
 public class CharacterInputdenandra : MonoBehaviour
 {
 
 void FixedUpdate () {
 ControllPlayer()
 }
 
 void ControllPlayer () {
 if (Input.GetButtonDown ("Fire1")) {
 
 GameObject go = Instantiate(Resources.Load("GS_Hitbox"), transform.position+(transform.forward*2)+(transform.up*2)+(transform.right*-1.5f) , transform.rotation) as GameObject;
 go.transform.parent = transform;
 Gs_HITDETECT = go;
 Invoke ("Amove",0.4f);
 }
 }
 
 void Amove () {
 DestroyObject (Gs_HITDETECT);
 }
 }

This is used to create the prefab which is a trigger that detects if any enemy is inside. The prefab has this script attached to it:

 using UnityEngine;
 using System.Collections;
 
 public class HitDetection : MonoBehaviour {
     public GameObject enemy;
     public int Weapondamage;
     Stats enemyhealth;
     
     void Awake () {
     }
     
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         Weapondamage = transform.root.gameObject.GetComponent<Stats> ().damage;
     }
     
     
     void OnTriggerEnter(Collider other) {
         if (other.tag == "Enemy") {
             enemy = other.gameObject;
             enemyhealth = enemy.GetComponent<Stats>();
             enemyhealth.TakeDamage (Weapondamage);
             print ("hit");
         }
     }
 }

Until here evrything works fine. if the enemy is hit i get the print right. The problem is when i acctually want to deal the damage in the Stats script attached to the enemy.

 using UnityEngine;
 using System.Collections;
 
 public class Stats : MonoBehaviour {
     public int maxhealth = 100;
     public int curhealth = 100;
     public int damage = 12;
     public bool hascollide = false;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
         if (curhealth <= 0f) {
             Destroy(gameObject);
         }
     
     }
 
     public void TakeDamage (int amount) {
         curhealth -= amount;
 
     }

}

The wierdest thing is that if i run the game as it is i cant deal any damage to the enemy, but if i go back to the first script and remove the part where i destroy the trigger, i can move around so just one "GS_Hitbox" can hit the enemy more than once, the enemy takes damage.

So to sum this up the problem is that my trigger does not deal damage when instantiated. Can someone please help me with this issue?