AVI file with two audio tracks
 

I've tried to create an AVI with 2 audio files (I used Nandub)
I tried several audios. Here is my result:

AC3/AC3 both audiotracks run parallel, can't select an audio track (no menu)
AC3/MP3 only the MP3 track does work, can't select an audio track (no menu)
MP3/MP3 does work, I can select each audio track.

If I use TCMP to play the above tracks Audio is fine in all AVI files

What is wrong?
:(