Ragdoll won't recieve damage from raycast gun, or allow move code, or deactivate

I have experienced many issues when trying to apply Ragdoll physics to an enemy in my game. When I applied these ragdoll physics to the enemy, it wouldn't follow its script to follow the player, it wouldn't recieve damage from the raycast gun i made, and I also couldn't disable the ragdoll in the enemy's script.

Help or fixes to the script would be greatly appreciated.

the enemy script:

 using System;
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class NewZombieScript : MonoBehaviour
 {
     public float ZombieSpeed = 4;
     public float ZombieRotationSpeed = 3;
     public float MaxDistzombie = 22.1f; // if larger than this, don't chase, otherwise, chase if lower than this and higher than MinDistzombie
     public float MinDistzombie = 3; // if larger than this and smaller than MaxDistzombie, chase player
     public Transform target;
     public float PlayerDistance;
     private bool chasing;
     public bool Alive;
 
     public int MaxZombieHP = 40;
     public int CurrentZombieHP;
     public HealthBar ZombieHealthBar;
 
     public Animator ZombieAnimator;
     List<Rigidbody> rigidBodies;
 
     private float attackTime; //time since last attack
     public const float attackRate = 1f; // attack cooldown
 
     private void Awake()
     {
         chasing = false;
         Alive = true;      
     }
 
     public void Damage(int ZombieDamage)
     {
         CurrentZombieHP -= ZombieDamage;
         ZombieHealthBar.SetHealth(CurrentZombieHP);
     }
 
     internal static void Damage()
     {
         throw new NotImplementedException();
     }
 
 
 
 
 
     // Start is called before the first frame update
     void start()
     {
         rigidBodies = new List<Rigidbody>(transform.GetComponentsInChildren<Rigidbody>());
         Alive = true;
         CurrentZombieHP = MaxZombieHP;
         rigidBodies.Remove(GetComponent<Rigidbody>());
         PlayerDistance = Vector3.Distance(transform.position, target.position);
     }
 
     // Update is called once per frame
     void Update()
     {
         PlayerDistance = Vector3.Distance(transform.position, target.position);
 
         if (Alive)
         {
             DeActivateRagDoll();
 
             if (PlayerDistance <= MaxDistzombie)
             {
                 GoToTarget();
             }
             if (PlayerDistance < MinDistzombie)
             {
                 StopZombie();
                 ZombieAttack();
             }
         }
 
         if(Input.GetKeyDown(KeyCode.M))
         {
             ActivateRagdoll();
         }
 
 
 
 
         if (attackTime > 0)
         {
             attackTime -= Time.deltaTime;
         }
 
 
 
 
         void GoToTarget()
         {
             if (PlayerDistance > MinDistzombie)
             {
                 ZombieSpeed = 4f;
                 chasing = true;
                 Debug.Log("Chasing");
             }
         }
 
         if (CurrentZombieHP <= 0)
         {
             Die();
         }
 
 
 
 
         if (chasing)
         {
             //rotate to look at the player
             transform.rotation = Quaternion.Slerp(transform.rotation, Quaternion.LookRotation(target.position - transform.position), ZombieRotationSpeed * Time.deltaTime);
 
 
             //move towards the player
             transform.position += transform.forward * ZombieSpeed * Time.deltaTime;
             Debug.Log("MovingToPlayer");
 
             if (PlayerDistance > MaxDistzombie)
                 chasing = false;
 
             //give up when out of range
 
         }
 
 
 
         else
         {
             //not currently chasing
 
             //start chasing when player is close enough
 
         }
 
 
         void StopZombie()
         {
             chasing = false;
             ZombieSpeed = 1;
             Debug.Log("StoppedMoving");
         }
 
         void Die()
         {
             Alive = false;
             ActivateRagdoll();
         }
 
         void ZombieAttack()
         {
             if (attackTime <= 0)
             {
                 attackTime = attackRate;
                 target.GetComponent<PlayerHealth>().TakeDamage(8);
                 Debug.Log("AttackingPlayer");
             }
 
         }
 
 
 
         void DeActivateRagDoll()
         {
             ZombieAnimator.enabled = true;
             for (int i = 0; i < rigidBodies.Count; i++)
             {
                 rigidBodies[i].useGravity = false;
                 rigidBodies[i].isKinematic = true;
             }
         }
 
         void ActivateRagdoll()
         {
             ZombieAnimator.enabled = false;
             for (int i = 0; i < rigidBodies.Count; i++)
             {
                 rigidBodies[i].useGravity = true;
                 rigidBodies[i].isKinematic = false;
             }
 
             foreach (Rigidbody rb in rigidBodies)
             {
                 rb.isKinematic = false;
             }
 
 
 
 
         }
 
 
     }
 }
 

the gun script:

 using UnityEngine;
 
 public class Gun : MonoBehaviour {
 
 public float PistolDamage = 10f;
 public float PistolRange = 100f;
 public float impactForce = 15f;
 public float fireRate = 3f;
 
     public Camera fpsCam;
     public ParticleSystem muzzleflash;
     public GameObject impactEffect;
     
 
     private float nextTimeToFire = 0f;
 
     // Update is called once per frame
     void Update(){
 
     if (Input.GetButtonDown("Fire1") && Time.time >= nextTimeToFire)
        {
             nextTimeToFire = Time.time + 1f / fireRate;
           Shoot();
        }
 
 }
 
 void Shoot ()
 {
         muzzleflash.Play();
 
     RaycastHit hit;
 
         if (Physics.Raycast(fpsCam.transform.position, fpsCam.transform.forward, out hit, PistolRange))
     //what's below only happens when a target is hit by the pistol's raycast
     {
       
         Debug.Log(hit.transform.name);
 
             NewZombieScript target = hit.transform.GetComponent<NewZombieScript>();
             if(target != null)
             {
                 NewZombieScript.Damage();
             }
 
             if (hit.rigidbody != null)
             {
                 hit.rigidbody.AddForce(-hit.normal * impactForce);
             }
 
             GameObject ImpactGO = Instantiate(impactEffect, hit.point, Quaternion.LookRotation(hit.normal));
             Destroy(ImpactGO, 2f);
            }
           }
          }