404 not found!

Turns out that sub_crud is not my default localhost location: here is my routes.php. Login is for an admin to login. 

 I am using a Login in controller to start and then after an admin logs in I switch to Configure controller
$route['default_controller'] = 'users/login';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;
$route['registration'] = 'registration';
$route['login'] = 'login';

In my httpd.conf I have:

DocumentRoot "C:/xampp/htdocs/sub_crud"
<Directory "C:/xampp/htdocs/sub_crud">

I have created a new controller called subit_backend.php that is sitting in my controllers directory.

This is its code:
   class register extends CI_Controller
   {

   public function __construct()
   {
       parent::__construct();

       $this->load->database();
       $this->load->helper('url');
         }


   public function register()
   {

   }

}

I also have a model called users.php that contains the login code. 

I put a break point at Break at first line in php script to see if it is getting initiated. I try typing the following at the browser
http://localhost/Subit_backend/register

and I still get error 404.

proof that an old dog can learn new tricks