admin section CMS section

[eluser]XPHARSH[/eluser]
Thanks for reply ya i have gone through some example like :

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

============================================

controllers //directory
|
+--admin // subdirectory
|
+--admin.php


===============================================

when i hit the URL :
http://localhost/web/codeigniter/admin/

it says me :


404 Page Not Found

The page you requested was not found.



But it's not working []

any help ?