Problem with multilanguages site and file urls

Hi guys,
I have one site configured with two languages: Italian (default) and English. My url's site looks like this:

http://drupal.print/it/admin/settings

And this is a piece of code of my own drupal module:

$documents = l(t('@document',
                       array( '@document' => $field_name)),
             $field_url);

The problem is that all files are can be reached with urls like this:

http://drupal.print/sites/default/files/users/nicoloconte/ese1.pdf

without the language "tag". But my module create urls with the language "tag" and I'm not able to display correctly the documents (files). How can I delete the language "tag" or tell to drupal to watch in the right folder?

Nicolo'