hi all I've had a few home cinema separates in the past but found them too big and bulky so purchased a Denon dht-500sd setup yesterday. The player seems to be having problems playing discs encoded with dts. I have have thrown 5+ dts discs into it. It automactically defaults to DD 5.1 and then when I change to dts using the input button it flashes dts in orange text but gives no sound. On 2 of the discs dts seems to work but only when I press the audio button on the remote (these 2 discs are THX optimized) but on the others it doesnt allow any change to be made via the audio button. I have checked that the discs are in the correct audio setting on their dvd setup menus on the discs also. Some of the discs are dvd-r's and others are shop bought. Any ideas? Does this happen with any other owners of the same product? Thanks in advance. Steve.