Psionic,
Go through all the settings audessy set for your sub and speakers (distances, gain levels etc) and write them down on a piece of paper.
Then peform a factory reset on the denon which brings it back to the factory settings. Check your manual on how to do this. On my denon it was while holding down speaker A + speaker B buttons press the power button, then the screen will flash in 1 sec intervals, then release the buttons speaker A + speaker B.
Once that is performed go through your settings manually and re-enter the values that are on your sheet of paper (do not run the auto setup with the mic again).
