I really need help with this message

I am sending a message to an object, asking it to print some numbers for testing, but when I activate it, it returns a NullReferenceException. What did I do wrong?

Sending End: Declare:

 var bomb : GameObject;

Send:

 bomb = gameObject.Find("BombBrick");
 bomb.SendMessage("explode", 10);

Receiving End:

   function explode(data){
         //if(data === gameObject){
                 var radius = 10;
                 var explosionPos: Vector3 = gameObject.transform.position;
                 var colliders: Collider[] = Physics.OverlapSphere(explosionPos, radius);
                 for (var otherHit: Collider in colliders) {
                     var rb: Rigidbody = otherHit.GetComponent.<Rigidbody>();
                     if (rb != null)
                     rb.AddExplosionForce(300, explosionPos, radius, 3.0F);
                 if (otherHit.GetComponent.<Collider>().tag=="Regular"){
                     Dotscore = Dotscore + 1;
                     Destroy(otherHit.GetComponent.<Collider>().gameObject, 1);
                 };
                 if (otherHit.GetComponent.<Collider>().tag=="Freeze"){
                     Destroy(otherHit.GetComponent.<Collider>().GetComponent.<Rigidbody>());
                 };
                     if (otherHit.GetComponent.<Collider>().tag=="Boom"){
                 };
             };
         Destroy(gameObject);