index.php in url

[eluser]Unknown[/eluser]
Hello,

can't find the answer/solution in the Manual, neither on the forum. A lot of similar problems, but not exact the same.

My files:
application/controllers/admin/admin.php
application/controllers/admin/login.php

My routes:
$route['admin'] = 'admin/admin';

Inside 'admin.php':

Code:

<?php
class Admin extends Controller {

    function Admin()
    {
        parent::Controller();    
    }
    
    function index()
    {
        redirect('admin/login', 'refresh'); // testing
    }
}
?>

My htaccess:

Code:

<IfModule mod_rewrite.c>
    RewriteEngine On
    
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?$1 [L]
</IfModule>

Problem:
When I surf to http://mysite/admin i get redirected to http://mysite/index.php/admin/login . How can I remove the index.php ? It's the first time I'm using subfolders in the 'controller' folder, therefore the index.php wasn't there...

Thanks for helping!