MPEG-4  ( H.264 ) Movies play ALL audio tracks simultaneously

In i-Tunes , when I try to play MPEG4's with multiple audio tracks (such as 1-english 2-director comment)both audio tracks play at the same time.
The files are MPEG-4's created by Nero Recode (AVC – HDTV profile).
There is no issue with any similar files with one audio track.
There is no issue playing these in VLC , WMP Mplayer, etc.
Is there an option to enable i-Tunes to allow me to select only one track?
Vista Ultimate 64-bit installed on a Core 2 Duo E6600 2.4GHz dual core CPU

Or, could someone explain how I might be able to view the file information in Terminal?

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