Audio Disappears When Exporting

I’ve been trying to get this animation done for a long time, and all that was left was the audio. Unfortunately, for some reason, the audio is either removed or made flat when I attempt to export. I’ve tried changing every setting I could think of, lowing the bitrate, making it mono, making it stereo, trying hinted streaming, using WAV files, and saving it as MP4. Nothing seems to work.

Am I missing something? All my audio levels are fine and the audio plays fine when I export in SWF format, but some of the transparency effects don’t work in that format so I really need it in MOV.

Any ideas? Any and all help will be greatly appreciated.