My MX-500 is already programmed to control my receiver, xbox, tv, HD STB, dvd player, boombox. I even used a radio shack remote to teach it several very useful discrete codes.

But here's my problem: I'm trying to teach the MX-500 the directional arrow buttons on my Sony PS2 remote. When I go to the setup menu on my MX-500 and try to learn the arrow buttons, the MX-500 says "GOOD". But then when I later try to use those buttons on my MX-500, I get no response from my PS2. Every other button on my PS2 remote can be learned correctly to my MX-500.

Anyone have any experience with this problem?
in case you didn't know, PS2 = Playstation 2