Wd live won't play AAC audio

Hey mike. Sorry for the confusion. The original AAC problem was with videos encoded with handbrake. That problem has since been resolved. The newest issue is building 2 1080 HD movies with megui and mkvmerge. One played fine (didn’t transcode that one myself) and the one I built the sound wasn’t working. I read some additional posts on this forum regarding your suggestion about using an older version of mkvmerge. I’m going to give it a try later this week and post the outcome. Thanks for all your help thus far!