Next enemy wave timer issue

Hi,

I'm creating a tower defence game.

I'm having trying to spawn a second batch of enemies (next wave) after the first batch has spawned (when enemiesSpawned >= enemiesToSpawn) after a certain amount of time has passed. so far the first batch will spawn and the second batch will not.

can anyone please help me figure this problem out?

Thanks,

 #pragma strict
 var enemyWayPoints:Transform[];
 var enemySpawn:Transform;
 var enemy:GameObject;
 var enemies:Array = new Array();
 
 
 var waveTime = 1;
 private var nextWaveTime = 0.0;
 
 var currentWave:int;
 var enemyCount:int;
 var enemiesToSpawn:int;
 var enemiesSpawned:int;
 
 var spawnRate = 1;
 private var nextSpawnTime = 0.0;
 
 function Start () 
 {
     enemiesToSpawn = 3;
 }
 
 function Update () 
 {
     print("next wave time = " + nextWaveTime);
     print("enemies to spawn = " + enemiesToSpawn);
     if(Time.time >= nextWaveTime)
     {
         for(var i:int=enemiesSpawned; i < enemiesToSpawn; i++)
         {
             if(Time.time >= nextSpawnTime)
             {
                 SpawnEnemy();
                 enemiesSpawned++;
                 print("enemies spawned = " + enemiesSpawned); 
                 CheckWave();
             }
         }
     }
     
 }
 
 function CheckWave()
 {
     if(enemiesSpawned >= enemiesToSpawn)
     {
         nextWaveTime = Time.time + waveTime;
         currentWave++;
         enemiesSpawned = 0;
         enemiesToSpawn = 0;
         print("current wave: " + currentWave);
     }
 }
 
 function SpawnEnemy()
 {
     nextSpawnTime = Time.time + spawnRate;
     var newEnemy = Instantiate(enemy, enemySpawn.position, enemySpawn.rotation);
     enemies.Add(newEnemy);
     print("enemies = " + enemies.length);
 }