Latest Snow Leopard. I just installed Lilypond, jEdit, and the lilypond plug-in. The Virtual piano displays, I can hear midi notes when I mouse-click on a key, or when I type, but no notes are added to the text file. The button panel does work to insert braces, rests and the like.

Any ideas? I'm a Mac hacker, python/java guy, but a noob to all these new tools.