My MX-900 was programmed by a professional installer. However, I wanted the software so that tweaks and additions could be performed by myself. I have familiarized myself with the software and made some small changes such as order of the items in the LCD, and moving items from the watch menu to the listen menu. Unfortunately, the hard button "previous channel" has never worked. I found the recall function that was programmed as an LCD item (DISH Sattelite DVR), and attempted to program the previous channel button for that function. When I have the remote connected to my laptop and use the test function, it works. However, on the remote itself, the button is dead. Doesn't beep or accomplish anything. What am I doing wrong? Any help would be appreciated!