Hi, I need o make a script that will make an enemy apply damage when it collides with the player, and when the player's health reaches 0, reload the level. Here's my simple script :

Player Script :

var health = 50;

function ApplyDamage (damage : int) {
     health -= damage;

     if(health <= 0) {
         Die();
     }
}
function Die () {
   Application.LoadLevel (Application.loadedLevel); 
}

Enemy Script :

var damage = 10;

function OnCollisionEnter (col : Collision) {

col.gameObject.BroadCastMessage("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
}

I think its a simple script, when i use it on some enemies, my FPS dropped like hell with about 10 enemies on my screen ( only happened while using scripts ), and doesn't damage my player however they collide... is there any problems in this script? Can anyone tell me whats the problem?