Why doesn't my phone show other music players when it asks to Open in a different app?

[AC Question]

Why my smartphone does not show other music player when it ask "Open in diffrent app"?

I have Asus zenphone 2 Laser. I generally use maple classic player to lisent songs. But now when I open any song from file manager, it ask to "open with" and shows only default music player. I have already installed 5 other music player including Maple, but it does not show in that option.

Plz help....

 

[B. Diddy]

Welcome to Android Central! What if you use a 3rd party file manager, like Total Commander?

If you open Maple, does it find all of the music in your directories?