Wrong sound channels on backup


I have backed up a few of my movies and generally everything is working perfectly.

However the one area that is causing problems is the audio channel. On the menus I am selecting basic 2 channel audio, and putting dolby digital or DTS on the main program.

However when I play the movies back in my home player the only soundtrack that it can find is a basic 2 channel Dolby Prologic one. As I am unchecking all sound except the one I want I dont understand why I always end up with a basic soundtrack.

Any info you can give would be appreciated.