I have had some problems with some remotes, but got them all in eventually. Make sure the units are a couple of inches apart. Make sure there is not to much light around while trying to learn. The big one for me was how long to hold down the original remote button. Try holding down the Yamaha remote button down for various times from really quick to a second or two and see if one of them catches. If not, look through the website here for the IR hex codes and manually enter in the IR code to IPronto. Strong batteries in the Yamaha can't hurt.