Hi! As i prefer some more control over the site's files, I changed the settings of the File content type, changing the upload destination from public to private. In the course's file list it works ok: the file's url is something like http://elearning.site.org/tft/download/file/19 . But when I click on more information for a file, in the file's page the file's url is http://elearning.site.org/system/files/file.ext and this obviously doesn't work. Thanks!
I did a test, the url on the file details page is also /system/files/file.ext, but it works.
Are you sure that your private files path is correctly configured with correct access rights?
If yes, do you have some error in logs?
Now it works... I don't know