No Audio With MP4 AFTER the Update! Was Fine BEFORE!

I bought a WD TV Live HD Media Player a week ago, wonderful device, but it has a problem with MP4 videos, they seems to “stutter”, then I updated my device hoping the problem will go away, and it did, now MP4 works smoothly but with out sound! Of course I mean digital sound. A user said that multi-channel ACC isn’t supported, the digital sound worked just fine before the update! Now the video is fixed but no sound at all!

What’s the problem?

Please add a Mediainfo Log of your Mp4

What Software was used to create the Mp4 ?