MOH issue

I’m running an Asterisk 1.4.22 ( QPKG on a QNAP machine )

MOH doesn’t work

That’s log error line produced when phones hold the line
WARNING[11214] res_musiconhold.c: Music on Hold class ‘default’ not found

A CLI command “moh show classes” gives NO output , as well as “moh show files”

This is musiconhold.conf :


of course a corrected format file is present on that path

Any suggestion ??