quicktime export - audio issue

[vj_jasper]

quicktime pro v. 7.6
os x 10.5.6

im trying to export AV files, so as to enable web-streaming.

easy to achieve with Video files..
AudioVisual Mov files do not export properly,
it doesnt seem to work.

has anyone else managed to get good results
exporting AV files through quicktime pro?

thanks for any help.