Hello, I'm after some help. I've had one of these systems for quite while, but I've only just noticed a problem with it. When I play a DVD in Dolby 5.1, the amp plays it in Analogue (PCM?) instead of Dolby. It's set to automatically select a mode. It's also the same when I manually select it. I' playing the DVD through a PS2 with an optical cable. Any help is much appreciated. Thanks, Tom.