I have a problem when I render in WMV format.
The active audio output, just not displayed settings.
And when I render, renders only the video but no audio.
Put a print image of what is happening.
I do not know what else to do ...
Version: AE CS6 22.214.171.124
Windows 7 - 64bit
Check the "Format Options". Audio may be disabled there.
I tested the format options, I changed the codec for Windows Media Audio 10 Professional and it worked!
Sorry my English.