terrain tree children problem

i have a bunch of trigger sphere colliders set up as a child of the tree renderer. When i painted them onto the terrain the trigger colliders dont do what the script on them is telling them to do. I dont know if they re even there. Please help im really confused.

EDIT : This script is part of a dynamic fire pack. An editor script it comes with generates like 400 sphere collider each with the script below on it. When the fire object comes in contact with a collider it instantiates another fireobject. I dont think the children colliders are there when its parent tree is painted on the terrain.

 #pragma strict
 var fireParticle : Transform;
 var firePoints : Transform[]; //Fire particles will be created at these positions once alight.
 var fuel : float = 100.0; //The amount of fuel stored in this object. Fuel will burn out over time.
 var fuelConsumption : float = 30.0; //The amount of fuel consumed per second by the object.
 var fireSpread : float = 2.0; //The radius at which fire will spread
 var spreadTime : float = 3.0; //The time after which fire will spread
 var randomRange : float = 1.2; //The random maximum time after the spreadTime
 var fallOutC : float = .05; //The chance that a Fire Point will fall out after some burn time
 private var fireStarted : boolean = false;
 private var fireC : Transform[];
 private var count : int = 0;
 private var fTime : short = 0.0;
 private var fSpread : boolean = false;
 private var fellOut : boolean = false;
 private var bColor : boolean = false;
 private var spPos : Vector3 = Vector3.zero;
 
 function Update () 
 {
     if (fireStarted)
         {
             fuel -= fuelConsumption * Time.deltaTime;
             if ((Time.time - fTime) >= spreadTime && !fSpread)
                 {
                     spreadFire();
                     if (Random.value > .95 && transform.root && transform.root.renderer && !bColor)
                         bColor = true;
                 }
             if (!fellOut)
                 {
                     if (Random.value > 1-fallOutC)
                         fallOut();
                     fellOut = true;
                 }
         }
     if (fuel <= 0 && fireStarted)
         endFire();
     if (bColor)
         {
             var CL : Color = transform.root.renderer.material.color;
             CL.r -= .01 * Time.deltaTime;
             if (CL.r < .1)
                 {
                     CL.r = .1;
                     bColor = false;
                 }
             CL.g = CL.r;
             CL.b = CL.r;
             transform.root.renderer.material.color = CL;
         }
 }
 
 function startFire()
 {
     if (!fireStarted)
         {
             fireStarted = true;
             for (var all : Transform in firePoints)
                 {
                     var fire = Instantiate(fireParticle, all.position, Quaternion.identity);
                     fire.parent = transform;
                     fireC[count] = fire;
                     count++;
                 }
             fTime = Time.time;
         }
 }
 
 function endFire()
 {
     for (var all2 : Transform in fireC)
         {
             if (all2.particleEmitter)
                 all2.particleEmitter.emit = false;
             for (var child : Transform in all2)
                 if (child.particleEmitter)
                     child.particleEmitter.emit = false;
         }
     fireStarted = false;
     for (var all3 : Transform in firePoints)
         Destroy(all3.gameObject, 5);
     Destroy(this);
 }
 
 function Awake()
 {
     fireC = new Transform[firePoints.length];
     setWind();
 }
 
 function spreadFire()
 {
     fSpread = true;
     var InRange = Physics.OverlapSphere(spPos, fireSpread);
         for (var all : Collider in InRange)
             {
                 yield WaitForSeconds(Random.value * randomRange);
                 if (all.GetComponent("FirePoint"))
                     all.SendMessage("startFire");
             }
 }
 
 function fallOut()
 {
     transform.parent = null;
     rigidbody.useGravity = true;
 }
 
 function setWind()
 {
     yield WaitForSeconds(.1);
     switch (WindControl.windV)
         {
             case 0 : spPos = transform.position; break;
             case 1 : spPos = transform.position + Vector3(0, 0, fireSpread-(fireSpread/(1+(2 * (WindControl.windS+0.001))))); break;
             case 2 : spPos = transform.position - Vector3(fireSpread-(fireSpread/(1+(2 * (WindControl.windS+0.001)))), 0, 0); break;
             case 3 : spPos = transform.position + Vector3(fireSpread-(fireSpread/(1+(2 * (WindControl.windS+0.001)))), 0, 0); break;
             case 4 : spPos = transform.position - Vector3(0, 0, fireSpread-(fireSpread/(1+(2 * (WindControl.windS+0.001))))); break;
         }
 }