MP4Box + Yamb != Flash compatible A/V MP4

[MoFoQ]

The details:
Yamb 1.6 (http://kurtnoise.free.fr/Yamb/) (also tried Yamb 2.1.0.0-Beta 2)
MP4Box 0.4.6 Build 20091013 (http://kurtnoise.free.fr/mp4tools/)

Installed version of Flash is 10,0,42,34
I've tried NonverBlaster (http://nonverbla.de/blog/2008/09/15/nonverblasterhover/) and I'll try out Flowplayer and JW in a bit.

The issue:
The video (MP4) and the audio (mp3) by themselves play just fine in Flash but when it's muxed together, it doesn't play the audio.
The file (muxed file) itself seems to play fine in MPC-HC and VLC.

Any ideas?
I've also tried using the Interlace options without any luck.
Or is there a newer build of MP4Box that works better?
(some of the links on the software page of doom9 aren't working)

:thanks:

[Dark Shikari]

Try AAC instead. I've heard Flash has some issues with MP3 in MP4.

Or try the FLV container instead.

[MoFoQ]

really? dang...that sucks.

(offtopic: ooo...claremont?)