Wd live won't play AAC audio

The problem seems to be with my transcoding.  The original MKV of Avatar works properly and that video is DTS.  My “compilation” is also DTS but that won’t play.  Only difference when I view the 2 files in MediaRaw is that the audio bitrate on Avatar is displayed and there is no bitrate displayed for my “compilation”.  MKVmerge has all the same settings when compared.  I’m using MeGUI to transcode the “compilation”.  I’m not exactly sure what the difference is, but its going to have to be a trial and error till I figure it out.  Any other ideas?!?