Make sure the extensions running (and make sure you installed it...) by typing sm exts list.
Sorry to bother but I've installed the extension to the proper location and ReadyUp still doesn't work for my server. I'm new at all of this--but when I type sm exts list left4downtown doesn't show up on the list at all. Did I miss a step in the installation process? (And yes I have restarted server. Several times.)