I've just added a HD Tivo to my system that had a Tivo Series 2 box. I've got the individual remotes configured to a '1' and '2' as instructed. But, I'm having a problem getting the Pronto to learn the ENTER function. It's reading all the other functions, but that one doesn't stay on long enough to be read? (All the other buttons have a continous read indicator light, the ENTER button is a quick on/off.) Any ideas or thoughts?