Default JetAudio Music Player and APE files.

I would like to ask to anyone who use this software (JetAudio Music Player) on the Galaxy S2.
Developer says APE (Monkey's Audio) is supported but I can play any APE file with this app. I does not even see the folder where they are stored.
Anyone with this issue? It's the app or my ROM? (look signature).
Greetings!
Device:
Nexus 5: Stock KTU84P (Rooted)