He wont need it if he uses above APP I linked to.
Hold your Remote infont of a Camera LCD screen like on a Phone and press buttons, you should see if it works or now., also that APP will tell you by the Midi signal if it works.
Are you sure that Front Line Drive box is for an Audify 2 as the Remote is a new model and im pretty sure it wont work on it (not 100% though)
Also have you connected a Floppy Power connector to the Line drive box and the Ribbon Cable ?.