3d platformer collider issues

Im currently working on a 3d puzzle platformer based around a cube, I've created 4 colliders on each corner of the cube in order to allow me to switch the camera on trigger as well as movement axis. However I have found when I jump through them the colliders seem to stop working. My current movement script is as follows:

var speed : float = 6.0; var jumpSpeed : float = 8.0; var gravity : float = 20.0;

private var moveDirection : Vector3 = Vector3.zero;

function Update() { var controller : CharacterController = GetComponent(CharacterController); if (controller.isGrounded) { // We are grounded, so recalculate // move direction directly from axes

   //  var v = Input.GetAxisRaw("Horizontal");

// transform.Translate(Vector3.forward * (v/5));

   //  moveDirection = Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
     moveDirection = Vector3(0, 0, Input.GetAxis("Horizontal"));
     moveDirection = transform.TransformDirection(moveDirection);
     moveDirection *= speed;
    
     if (Input.GetButton ("Jump")) {
         moveDirection.y = jumpSpeed;
         
    }
 }

 // Apply gravity
 moveDirection.y -= gravity * Time.deltaTime;
 
 // Move the controller
 controller.Move(moveDirection * Time.deltaTime);

}

Any help would be greatly appreciated.