Door script doesnt work need help

I made this script but I cant get the collider working. will someone please help me here is the script

// Smothly open a door var smooth = 2.0;

var DoorOpenAngle = 90.0;

var DoorCloseAngle = 0.0;

var open : boolean;

var enter : boolean;

//Main function

function Update (){

if(open == true){

var target = Quaternion.Euler (0, DoorOpenAngle, 0);

// Dampen towards the target rotation

transform.localRotation = Quaternion.Slerp(transform.localRotation, target,

Time.deltaTime * smooth);

}

if(open == false){

var target1 = Quaternion.Euler (0, DoorCloseAngle, 0);

// Dampen towards the target rotation

transform.localRotation = Quaternion.Slerp(transform.localRotation, target1, Time.deltaTime * smooth); }

if(enter == true){

if(Input.GetKeyDown("e"))

{

open = !open;

}

}

}

//Activate the Main function when player is near the door

function OnTriggerEnter (other : Collider)

{

if (other.gameObject.tag == "Player")

{

(enter) = true;

} }

//Deactivate the Main function when player is go away from door

function OnTriggerExit (other : Collider)

{

if (other.gameObject.tag == "Player")

{

(enter) = false;

}

}

sorry for bad english