Enemy script

var damage = 10;

function OnCollisionEnter (col : Collision) {

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

Player Script

var health = 50;

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

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

I used these both scripts, one on the cube and one on my player. But when the cube collides with my player, nothing special happens, it just walks past my player like nothing happened. What should i do? Does the problem lie on.... that's the problem... i don't know what should be taken care off.

PLZ help cause i'm.... lost and noob..