Problem with Custom config file

[eluser]Unknown[/eluser]
Hmm... seems your right, I was using the database.php config as a template. Thanks for your help, but just out of my sheer curiosity, why does database.php, routes.php,smileys.php etc.. get away with this and I can't?

Code:

$db['dev']['hostname'] = "172.29.97.7";
$db['dev']['username'] = "xxxx";
$db['dev']['password'] = "xxxx";
$db['dev']['database'] = "code_igniter";
$db['dev']['dbdriver'] = "postgre";
$db['dev']['dbprefix'] = "";
$db['dev']['pconnect'] = TRUE;
$db['dev']['db_debug'] = TRUE;
$db['dev']['cache_on'] = FALSE;
$db['dev']['cachedir'] = "";
$db['dev']['char_set'] = "utf8";
$db['dev']['dbcollat'] = "utf8_general_ci";