FLAC or MP3 wont play at DLNA device

Hi, I´ve been using the server for quite a long time but now after a system change (to mac) I´ve found the feature that LMS is also a DLNA server. My problem is that I can see the videos in my OPPO blu ray player, but when I select a FLAC or MP3 file, the player freezes.

I know the player can play these files (it did from other DLNA server and from the USB) so I am sure I am missing some sort of configuration.

Does anyone know what I should tweak?

thanks!!
Demian