URL shows error 404 instead of default controller

Hi,

I'm looking for a bit of guidance with this one, as it's proving to be a bit tricky!

My set up is as follows:

• I have /application and /system in a non-public folder
  
• I have two URLs (at the moment): example.com and another.example.com
  
• In my public_html folder, I have index.php and /another/index.php (for the subdomain) - both pointing to the same application and system folder (essentially, two sites running same config etc.). I'm not sure if this is the best approach, but having tried a few, this is the only one that works (except the issue below)
  
• Both config and routes are set up to check $_SERVER['HTTP_HOST'] and set the values based on this
  
• All controller files for 'another.example.com' are stored in /controllers/another/
  

So, in my routes.php file, I have the following:

PHP Code:

$route['404_override'] = '';
$route['translate_uri_dashes']             = TRUE;

if (strstr($_SERVER['HTTP_HOST'], 'another.example.com')) {
    $route['default_controller']     = "another/login/index";
    $route['(.+)']             = 'another/$1';
}
else
{
    $route['default_controller'] = "welcome";
} 


However, visiting just 'another.example.com' shows a 404 rather than /another/login

Hopefully I've given more than enough info, but knowing me I've missed something simple!

Any help appreciated!