Ixpand Will not play Video after update

I have a similar issue as Ted. I videoed karaoke songs from my camera on my IXpand. They are all sorted on the drive and I can play them on my iPad mini with no issue. When I try to play them on my karaoke machine using Bluetooth, it starts and then stops and words and music are out of timing. I never had this issue until a few weeks ago. My iso is 9.3.5 and the ixpand is up to date. The files are MOV formate. I need to fix this issue. I have a number of shows coming up. Any suggestions? Please HELP!