How recent is your Denon purchase? Perhaps a local tech there could walk you through some of the less intuitive menu items and spot what's going on. They can be very tricky. There is great expertise in this board but it's tough to tackle setup issues sometimes because you have to go step by step and check so many menus.
I had a very good experience calling my HT shop for some initial setup help and they walked me through a nasty issue that would have taken me days to figure out via the manual as the box actually needed a hard reset to clear whatever it was mixed up about. I wasn't doing anything wrong, it just needed a whack in the head.
Of course, you may be in a cost situation for support now, depending on how helpful your shop is. Just a thought.
