Cant get right audio (newbie)

[clone1020]

I am trying to back up xmen2 using clonedvd with anydvd in the options screens there are only two ac3 audio channels shown i check these both but still when it burns to disc all i get is the movie with the directors audio commentary on both channels.
I am new to this game but have manged to back up other titles with good success. Any tips would be much appreciated.