Won't connect? Is your OSX firewall on? If yes did you make an exception for LW? LW did not support UPnP back then in those versions I don't believe, or at least I suspect the Java version of that period might not have been effective enough to run UPnP, in which case, if you have a router or modem with NAT, then you will need to port forward that device. To port forward, read manual, first & most important step is setting up a static ip.