object not spawning but no error message

im trying to get a gameobject to spawn using these 2 scripts

(my trigger script)

function Update () {

//if(Input.GetKeyDown(“t”)) ToggleTrigger();

}

        function ToggleTrigger () {
 if (collider.isTrigger == true) {
         collider.isTrigger = false;
         print("Close");
 }
 else{
         collider.isTrigger = true;
         print("Opened");
 }
          }

and

(my send message/spawn script)

var sendToObject: GameObject;

var correctObject: GameObject; //this is the only object we allow to trigger the event

var targetFunction: String; // the name of the function to call

var prefab: Transform;

function OnTriggerEnter (object : Collider) {

    if(object == correctObject.collider) 
            sendToObject.SendMessage("targetFunction");
            Instantiate (prefab, Vector3(0, 0, 0), Quaternion.identity);
 }

function OnTriggerExit (object : Collider) {

    if(object == correctObject.collider) 
            sendToObject.SendMessage("targetFunction");
 }

my issue is that my game runs with no errors but my prefab is NOT spawned, ive checked http://unity3d.com/support/documentation/ScriptReference/Object.Instantiate.html & http://unity3d.com/support/documentation/Manual/Instantiating%20Prefabs.html sections of unity for help and but to no real avail can any one help me?