Denon 3910 Audio Options Grayed Out

I have a Denon 3910 DVD player and for some reason I cannot access most of the audio options on the menu (they are grayed out). Every options except 'compression' and 'sacd filter' is grayed out. Anyone know how I can get access to those options? It happens even with no disc in the player.

[Tony B]

It could be that some of the options are only enabled if you have made the appropriate physical connections, e.g. Denon-Link

[Miniholic]

Just had a look at mine, activating Denon Link leaves you with just the two options you describe. This will be because the Denon Link gives a direct digital connection to your amp bypassing the processing.

If you aren't using Denon Loink, turning it off in the digital coinnection menu will restore the other audio options.