HMVC: problem when controller extends from MX_Controller

[eluser]Unknown[/eluser]
Hello,

The problem is when my controller extends from 'MX_Controller', php thows an error message like ' Fatal error: Cannot redeclare class CI in application\third_party\MX\Base.php on line 83'

My code is :

Code:

class Javascript extends MX_Controller {

    function javascript()
    {
        parent::__construct();
    }

    function index()
    {
    }

    function add() {

    }


    function _remap() {

    }
}

But, my code's working when the controller extends only from Controller.

Why?

Patrice