I've imported a MPG4 file into Flash MX. The video imports but the audio doesn't, or at least it doesn't play when I "test movie".

When importing, I choose "Embed Video in Macromedia Flash Document"

then I leave "Quality" "Frame Interval" and "Scale" at the defaults, (100%, 24, and 100%).

Synchronize Video and Import Audio are both checked.

Any thoguhts as to how I can solve this?

Thanks