No Playable files

I have used the TWONKY DLNA Server feature in the MYBookLive and recently it has stopped with a message of No PLayable files.

I have power on and off the drive

Updated the firmware

Rescanned the drive

Rebuilt the database

It can find music and videos and reports them in the database but will not play them.   I have installed another media server on my PC and the DVD player is playing the files from that DLNA server fine. 

What else do I need to do to get the TWONKY DLNA server to work again?

If you try to access the my book as a network share, can you play the files fine?