Frantic and Titans audio issues anyone?

[Zantetsuken]

Hi I was just wondering if anybody else has had problems playing the DTS HD Master 2.0 track on the Blu-rays Frantic and Clash of the Titans??

I am playing the discs from my Sony BDP-S350 through my Pioneer SC-07 and it is registering on screen with DTS HD Master Audio 2.0 but there is no sound at all.
Now I have been able to get sound if I switch the Blu-ray player settings from 'BD Audio Auto' to 'Downmix PCM' but then I can only listen to a downmixed stereo track.
Anyway thankyou, just curious if anybody else has these issues
(Oh , by the way the French 1.0 tracks work fine on both discs and I also have already exchanged both movies for a new copy from Bestbuy) Thanks!!