Modular Separation Config Route problem

[eluser]Prabhjeet[/eluser]
Hi,

I have a small problem with MS custom routing file.

Here I have code in main routes.php file and its working fine
users(module)/admin(directory)/users(controller)

Code:

$route['admin/users'] = 'users/admin/users';

but now when I put this code in users module's config directory I get 404 error. I want to separate routes according to their relevant modules.

Help please!