I have a non-JP1 6131 that, so far, works quite well. For my Dish 510 receiver, I've used code 1775, which controls most of what I need. But, I can't seem to get the skip back 8 seconds button to work. The skip ahead 30 seconds button works, as do all the other PVR related buttons. Any suggestions on how to enable the skip back button for my 510?

Thanks!