No sound in particular game?

Im having an issue with Ferrari challenge ever since I bought my Z5500 speakers, there is no sound :@, the control pod displays dolby digital but no sound comes out.... all other games work fine, and the game does work with sound when you plug it through an analouge sound connection.

Have you tried switching the receiver from the PS3's audio to Tuner? That usually happens to me when I play games like Saints Row 2, but I'm using an Optical for mine. Its like it doesn't correctly output the sound so you need to mess around with the receiver itself.

Im running optical too, not much i can mess around with, its auto adjusting on the z5500's.