ok i just got a panny rp-91 from someone here on the forum. i have it hooked to a denon 3300 through the 6 channel inputs on the back. i have the fleetwood mac rumors dvd-a playing. why can't i adjust the volume. i have read this forum and other forum and several FAQ'S, but can find no answer to this question or advice. i re-read the manuals for both the dvd player and the denon, but still no answers. can anyone help me with this. i am new to the dvd-a thing so maybe i just missed something minor that will fix this situation.