GarageBand audio not audible in movie shared to iTunes. HELP

[jonl]

I have searched all over for a fix for this, but this is all I found (Please see link below)
Has anyone ever been able to share to itunes in Full Quality?
I can listen to it in iTunes just fine, but when I send to youtube it picks up the audio from my video camera.

http://support.apple.com/kb/TS3621?viewlocale=en_US