help with Collision

I have been having problems with collision (error message : NullReferenceException: Object reference not set to an instance of an object) I can`t seem to be able to find much thats helpful.
Here is my code:

var level = "ILH";
var LLD = "ITH";
function OnTriggerEnter (collide : Collider) {
if(collide.gameOdject.tag == "Player"){
Application.LoadLevel (level);
if(collide == null)
Debug.Log("collided with other");


if(collide.gameO d ject.tag == “Player”)

Spelling mistake…

now it just does nothing