I know all about that- but the support FAQ's and other posters have said to click on Tools in LW, then "advanced" and then "Firewire." That's what I don't have, maybe because I have Basic LW?
It seems to be working now, though. I don't know what happened, if re-installing it solved the problem or what.

Thanks for the help. I've dealt with the Firewall issues on other torrent programs, never seem to find a port that works.