GarageBand 10.0.3 Export (mixed) Movie No Sound
I used to create mixes (movie track + audio track) on GarageBand without having any issues. The original movie track has its own audio track, which I mute/delete, then I mix in a new audio track. This time, I can still export the movie (to disk) and everything seems okay until I post the movie on Facebook and/or send the exported movie into my iPhone--- suddenly the audio's gone. I didn't use to have this problem.
Thanks.
Yosemite 10.10.1
GarageBand 10.0.3
MacBook Air, OS X Yosemite (10.10.1)