Audio Problem

Using the latest version of DVDFab. I’m backing up some BD’s to an external hard drive so I can stream them thru my PS3.
I’m having a problem with getting the correct audio stream. I get the director’s comments track. When I change the audio stream via the PS3 remote, the audio is the same, but I see the following on the bottom left corner of the tv screen.

Press “Audio” Once: Left
Press “Audio” Twice : Right
Press “Audio” Three Times : Right & Left

My Yamaha receiver is older and is Dolby Digital 5.1 & DTS.
The PS3 is connected to the receiver via optical.

Any suggestions are appreciated!!

Randy T