I just changed some equipment which involved getting rid of the receiver that controlled volume. I deleted that device on the R50, but the VOl UP and DOWN buttons refuse to learn the new volume codes although I can assign those functions to other buttons on the R50 via the learn facility. Any thoughts as to what is going on? My intuition tells me that those buttons still think they are controlling the device I got rid of. Perhaps deleting the device did not remove its codes. If so, how do I get rid of them?