Trigger Explosion null reference problem

im new to unity and trying to trigger an explosion.

eg. apartment building entrance. car on fire across the street. player walks through apartment door door, BOOM! car explodes...

oooo cinematic right!? hahaha...

SO! i have a cube with a detonator attached named "Exploding Cube"... then a larger trigger cube named "Explosion Trigger"

"Explosion Trigger" has a JS script with this: and "Exploding Cube" is plugged into the gameobject slot...

var cube : GameObject;

function OnTriggerEnter(collision : Collider) { cube = GameObject.Find("Exploding Cube"); cube.GetComponent("Detonator").Explode(); cube.GetComponent("MeshRender").enabled = false; }

i run into the trigger explosion pauses midway and gives me "NullReferenceException: Object reference not set to an instance of an object

HELP PLEASE!!!!!! i wish unity had a visual editor like UDK!!!