i tested the way which you appointed me, but in my case i need it works with 2 domains in a same hostname.

i configure two conf files for my 2 domains, and appointed to them in my config.inc.php with the lines:

$config['include_host_config'] = array(
  'sinos.com' => 'sinos.com.inc.php',
  'vinicius.net' => 'vinicius.net.inc.php'
);