Q: Narration not playing for Read Aloud

To start, I am hand coding this, not using iBooks author or any 3rd party editor.

I can't seem to get my narration file to start playing.

I've used the Fixed Layout example from Apple to see what I need, and set up everything pretty similarly. When I turn on the narration, nothing happens.

I believe my SMIL is correct, as well as the audio being encoded correctly. If I embed the sound file directly, it plays no problem. If I set my narration as the background sound file, it plays just fine.

In fact, here is the code

I cannot figure out why I can't get it work.

Any help would be appreciated.