I have connected my Pioneer DVD DV-360 to Dolby pro-logic mini system. I used RCA cables (white and red) to connect them. I get sound from my Dolby pro-logic mini system when I select DD or 5.1 option on the DVD film However I get NO SOUND from my Dolby pro-logic mini system when I select DTS sound on the DVD film. WHY ? ANY SUGGESTIONS ? (I can only use RCA cables since my mini system only have RCA type input)