Infuse - AirportExtreme

Hi, I've been searching for support on setting an external hdd to work with the apple tv, while connected to my airport extreme, then found a way to finally get the Share (SMB server) to appear on the "My Files" section on infuse following this but evetytime I try to see the files there are no folders to display, just the message "There are no files for playback" or something like that.

cant find anything to point me in the right direction as if theres something I should enable on the airport settings to actually browse media on apple tv...

Any help would be much appreciated.