Character pass trought wall...

Hello, i have a little problem, i know thats its not a big problem but i dont know how to repair it. my character pass trought wall with one script but not with the other.. with this script (The Good) i pass trought my wall :

 var speed = 13;
 var gravity = 20.0;
 
 private var moveDirection = Vector3.zero;
 private var grounded : boolean = false;
 
 function FixedUpdate() {
     if (grounded) {
 
 if (Input.GetKey("w") || Input.GetKey("s"))

     {
        transform.Translate(0, 0, Input.GetAxisRaw("Vertical") * Time.deltaTime * speed);   //Axe Z
     }
 
 if (Input.GetKey("a") || Input.GetKey("d"))
     {
        transform.Translate(Input.GetAxisRaw("Horizontal") * Time.deltaTime * speed, 0, 0);   //Axe X
     }
 
     }
 
     //Mettre la gravité
     moveDirection.y -= gravity * Time.deltaTime;
 
     // Bouger le joueur
     var controller : CharacterController = GetComponent(CharacterController);
     var flags = controller.Move(moveDirection * Time.deltaTime);
     grounded = (flags & CollisionFlags.CollidedBelow) != 0;
 }
 
 @script RequireComponent(CharacterController)

and with my older script he did not pass :

 var speed = 13;
 var jumpSpeed = 8.0;
 var gravity = 20.0;
 
 private var moveDirection = Vector3.zero;
 private var grounded : boolean = false;
 
 function FixedUpdate() {
     if (grounded) {
 
        moveDirection = Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
        moveDirection = transform.TransformDirection(moveDirection);
        moveDirection *= speed;
 
        if (Input.GetButton ("Jump")) {
          moveDirection.y = jumpSpeed;
        }
     }
 
     //Mettre la gravité
     moveDirection.y -= gravity * Time.deltaTime;
 
     // Bouger le joueur
     var controller : CharacterController = GetComponent(CharacterController);
     var flags = controller.Move(moveDirection * Time.deltaTime);
     grounded = (flags & CollisionFlags.CollidedBelow) != 0;
 }
 
 @script RequireComponent(CharacterController)

My wall have a mesh collider on it because it is a model 3D .. This one : http://www.fileserve.com/file/WthEprQ/level 1.FBX