I've got an odd problem with my MX-500 remote. I am trying to learn the volume up & down control from my Aiwa receiver, as I just discovered it no longer works on the MX-500. It appears to take, but won't work when I attempt to use it on my receiver. The odd thing is that I previously "punched" through the receiver volume control to the DVD player and it was still working when I was in the DVD function. Unfortunately, I don't have the punch through volume control anymore because I erased it, thinking that the punch through may be the cause of my problems... but it wasn't. Now I don't have any volume control whatsoever for my receiver. I did make about a dozen attempts to learn the volume function, varying the distance between remotes and the length of time I hold the volume button on the receiver remote. The function seems to take every time, but it just won't work. Has anyone had a similar problem with the MX-500 ? And any suggestions on what I can do to correct the problem ?