duplicating enemies not working correctly

Hai i have an enemy, its working good, but when i create duplicates of the enemy, only the original can attack me. I can't attack the duplicate, but if i attack a duplicate the original dies and duplicates stands there with default animation. My health variable is not static. here are my codes

Enemy_movement

 public static Enemy_movement Instance;

 Transform player;
 NavMeshAgent nav;

 // Use this for initialization
 void Awake () 
 {
     Instance = this;
     player = GameObject.FindGameObjectWithTag ("Player").transform;
     nav = GetComponent<NavMeshAgent> ();
 
 }
 
 // Update is called once per frame
 void Update () 
 {

     if (Enemy_Health.Instance.CurrentHealth > 0 && Player_Health.Instance.CurrentHealth > 0)
     {
         nav.SetDestination (player.position);
     }
     else
     {
         nav.enabled = false;
     }
 
 }

Enemy_Attack

   public static Enemy_Attack Instance;

 public float TimeBetweenAttack = 0.5f;
 public float distance;
 public int AttackDamage = 10;
 public float[] AnimLength = new float[3] {0.458f, 0.500f, 0.500f};
 
 public GameObject targetLookAt;
 GameObject player;

 Animator anim;
 bool inAttackRange;
 //Enemy_Health enemyHealth;
 float timer = 0f;
 int attackCount=0;

 // Use this for initialization
 void Awake () 
 {
     Instance = this;
     player = GameObject.FindGameObjectWithTag ("Player");
     anim = GetComponent<Animator> ();    
     targetLookAt = GameObject.Find ("targetLookAt") as GameObject;
 }
 void Update () 
 {
     timer -= Time.deltaTime;
     distance = Vector3.Distance(targetLookAt.transform.position, gameObject.transform.position);
     Debug.Log ("Distance=" + distance);
     if (distance <= 2.5f) 
     {
         inAttackRange = true;
     }
     else if (distance < 10f) 
     {
         inAttackRange = false;
         anim.Play("attack_walk");
         anim.SetBool ("InRange", true);
         attackCount = 0;
         timer = 0f;
     } 
     else 
     {
         anim.SetBool ("InRange", false);
     }

     if (Player_Health.Instance.CurrentHealth <= 0) {
         anim.SetTrigger ("PlayerDead");
     } else 
     {
         if (inAttackRange&& Enemy_Health.Instance.CurrentHealth > 0) 
         {
             Attack ();            
         }
     }
 }

 void Attack()
 {
     if (timer <= 0f) 
     {
         if (attackCount == 0) 
         {
             timer = AnimLength [0];
             timer += 0.3f;
             anim.Play("attack_1");
             attackCount++;

         }
         else if(attackCount == 1)
         {
             timer = AnimLength [1];
             timer += 0.3f;
             anim.Play("attack_2");
             attackCount++;

         }
         else if(attackCount == 2)
         {
             timer = AnimLength [2];
             timer += 0.3f;
             anim.Play("attack_3");
             attackCount++;

         }
         else if(attackCount > 2)
         {
             attackCount = 0;
         }
     }
 }

 public void DamagePlayer() //animation event function
 {
     if (Enemy_Weapon_Collision.Instance.colliding) 
     {
         if (Player_Health.Instance.CurrentHealth > 0)
             Player_Health.Instance.TakeDamage (AttackDamage);
     }

 }

Enemy_Health

 public static Enemy_Health Instance;

 public int StartingHealth = 100;
 public int CurrentHealth;
 public int ScoreValue = 10;
 private GameObject ragdoll;

 // Use this for initialization
 void Awake () 
 {
     Instance = this;
     CurrentHealth = StartingHealth;
 }
 
 // Update is called once per frame
 void Update () 
 {
 
 }

 public void TakeDamage (int amount)
 {
     CurrentHealth -= amount;

     if (CurrentHealth <= 0) 
     {
         Death();
     }
 }
 
 void Death()
 {
     if (ragdoll == null) 
     {
         ragdoll = GameObject.Instantiate(Resources.Load("Ragdoll_samurai"), 
                                          transform.position, 
                                          transform.rotation) as GameObject;
     }
     
     var characterRoot = transform.FindChild("metarig");
     var ragdollRoot = ragdoll.transform.FindChild("metarig");
     
     //Match the ragdoll's skeleton to character's skelecton
     MatchChildrensTransforms (characterRoot, ragdollRoot);
     
     //destroy the character
     Destroy(gameObject);
     Collision_check.Instance.InRange = false;
     
     //Tell the camera to look at the ragdoll
     TP_Camera.Instance.TargetLookAt = ragdoll.transform.FindChild("metarig/Root");
 }

 void MatchChildrensTransforms(Transform source, Transform target)
 {
     //Traverse through the skeleton hierarchy to matching joint rotation
     if (source.childCount > 0) 
     {
         foreach (Transform sourceTransform in source.transform)
         {
             Transform targetTransform = target.Find(sourceTransform.name);
             
             if (targetTransform != null)
             {
                 MatchChildrensTransforms(sourceTransform,targetTransform);
                 targetTransform.localPosition = sourceTransform.localPosition;
                 //targetTransform.localRotation = sourceTransform.localRotation;
             }
         }
     }
 }

Player_Health

 public static Player_Health Instance;

 public int StartingHealth = 100;
 public int CurrentHealth;
 public Slider HealthSlider;
 public Image DamageImage;
 public float FlashSpeed = 5f;
 public Color FlashColour = new Color (1f, 0f, 0f, 0.1f);

 Animator anim;
 bool isDead;
 bool damaged;


 // Use this for initialization
 void Awake () 
 {
     Instance = this;
     anim = GetComponent<Animator> ();
     CurrentHealth = StartingHealth;    
 }
 
 // Update is called once per frame
 void Update () 
 {
     if (damaged)
         DamageImage.color = FlashColour;
     else
         DamageImage.color = Color.Lerp (DamageImage.color, Color.clear, FlashSpeed * Time.deltaTime);

     damaged = false;
 
 }

 public void TakeDamage (int amount)
 {
     damaged = true;
     CurrentHealth -= amount;

     HealthSlider.value = CurrentHealth;

     if (CurrentHealth <= 0 && !isDead) 
     {
         Death();
     }
 }

 void Death()
 {
     isDead = true;
     anim.SetTrigger ("Dead");
     TP_Animator.Instance.Die ();
 }

please help, this is my project and am stuck here, thank you.

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