Just bought the Advanced scart cable with digital audio cable to hook up to my Sony DE445 amp for Dolby Digital/DTS sound but I just cannot make it work. There's no sound coming through at all. Amp is fine because I have digital sound coming through a coaxial cable from my DVD player. I've tried different settings on the amp but no luck. The XBOX is set up for Dolby digital also, so I don't know what else to try. Heeeeeeeeeelp!!!!!!