Sound randomly stops while streaming movie from PC

Hi,

while streaming movies from my pc through my WD TVlive device the sound stops, then if I pause the movie with the controller and then play again the sound will resume with the movie.

Can any one explain this and offer a fix?

I have checked that the firmware is up to date etc.Iam streaming through an ethernet connection via a Telstra Bigpond router.

Thanks.

Over network shares or DLNA?