Particle Emitter starts when I have an object

I'm making the surviving island game and I have a problem. I'm on the last part, when I get the matches I want to go to the campfire and then if I walk there the fire begans, but I don't know why the particle system doesn't starts when I walk there.

Someone Help me please it's very important!

Thanks

The code:

 #pragma strict
 private var fireIsLit : boolean = false;
 function OnControllerColliderHit(col : ControllerColliderHit){
 if(col.gameObject.name == "campfire"){
 LightFire(col.gameObject);
 }
 }
 function LightFire(campfire : GameObject){
 var fireEmitters : ParticleEmitter[];
 fireEmitters = campfire.GetComponentsInChildren(ParticleEmitter);
 for(var emitter : ParticleEmitter in fireEmitters){
 emitter.emit = true;
 fireIsLit=true;
 campfire.audio.Play();
 
 }
 }
 
 function Start () {
 
 }
 
 function Update () {
 
 }