Problem condition in Animation

Hi guys, I need your help for a little problem in Animations.

Actually, I want to make Door which goes up and down. I've already done normal doors and sliding doors. With the same scripts i wanted to make my animation but arrived to the condition "Close" it always pass it.... which is impossible because my "Player" is still in the Collider >< Ican't understant and i really need your help ^^.

Theres is my code :

 Animator anim;
 bool doorOpen;

 void Start () {

     doorOpen = false;
     anim = GetComponent<Animator> ();

 }

 void OnTriggerEnter(Collider col) {

     if (col.gameObject.tag == "Player") {
     
         doorOpen = true;
         Doors ("Open");
     }

 }
 void OnTriggerExit(Collider col){
     if (doorOpen) {
         doorOpen = false;
         Doors ("Close");

     }
 }
 void Doors(string direction) {

     anim.SetTrigger (direction);
 }

Note that my others doors work perfectly !