Yeah, the same thing happened to me. I was going to post something about it. Use the codes on this link (I think they are for the 501?), they worked for me on my Sony DVD player. On the AUX controls, you gotta remember to put a 2 or 1 or whatever before the code, I couldn't get my Aiwa stereo to work with the remote until I read the manual more closer and used "2"+ the manual code.
http://www.dishnetwork.com/content/support/technical/remote_control_plat/
Good Luck,
Steve
http://www.dishnetwork.com/content/support/technical/remote_control_plat/
Good Luck,
Steve
