Input Key Named: Enter is unknown error, Door open on keydown

Hi guys, I have a javascript to open a door when i collide with it. I changed the code so it only opens when i press enter but im getting an error saying "Input Key Named: Enter is unknown". Can someone help me work out where i have gone wrong and how to fix it. thanks

code:

 private var doorIsOpen : boolean = false;
 private var doorTimer : float = 0.0;
 private var currentDoor : GameObject;
 
 var doorOpenTime : float = 3.0;
 var doorOpenSound : AudioClip;
 var doorCloseSound : AudioClip;
 var menu_beep : AudioClip;
 
 function Update(){
     if(doorIsOpen){
         doorTimer += Time.deltaTime;
     
         if(doorTimer > 3){
             Door(doorCloseSound, false, "doorshut", currentDoor);
             doorTimer = 0.0;
         }
     }
 } 
 
 function OnTriggerEnter(collisionInfo : Collider){
     if(collisionInfo.gameObject.tag == "Key"){
         audio.PlayOneShot(menu_beep);
         Destroy(collisionInfo.gameObject);
         achievementManagementScript.pickedUpKey();
     }
 }
 
 function OnControllerColliderHit(hit : ControllerColliderHit){
     if (hit.gameObject.tag == "Door" && doorIsOpen == false && Input.GetKeyDown("Enter")){
         currentDoor = hit.gameObject;
         Door(doorOpenSound, true, "dooropen", currentDoor);    
     }
 }
 
 function Door(aClip : AudioClip, openCheck : boolean, animName : String, thisDoor : GameObject){
     audio.PlayOneShot(aClip);
     doorIsOpen = openCheck;
     
     thisDoor.animation.Play(animName);
 }
 
 @script RequireComponent(AudioSource)