Robots Won't Spawn With Script

I'm making a shooter and I'm working on a Navigation AI for an enemy. Here's the script for it (JavaScript).

 var target : Transform;
 
     function Update()
     {
         GetComponent(NavMeshAgent).destination = target.position;
     }

However, when i added this script to the enemy, the enemy spawning script won't cooperate with the script. Here is that script (C#).edit This is the spawning script

     using UnityEngine;
 using System.Collections;
 
 public class RobotSpawner : MonoBehaviour 
 {
     public GameObject robot;
     public int respawnTime = 3;
     public Vector3 spawnValues;
     public int robotCount;
 
 
     void Start ()
     {
         StartCoroutine (SpawnWaves());
     }
 
     IEnumerator SpawnWaves ()
     {
         while(robotCount < 0)
         {
         
             Vector3 spawnPosition = new Vector3 (Random.Range(-spawnValues.x,spawnValues.x), spawnValues.y, spawnValues.z);
             Quaternion spawnRotation = Quaternion.identity;
             Instantiate (robot, spawnPosition, spawnRotation);
             yield return new WaitForSeconds (respawnTime);
     
         }
     }
 
 }

This is really frustrating so I would l would really like help, ask any question.