Well something is blocking LW's default port, possibly your ISP. There are a few articles around that suggest Eastlink are using traffic shaping for p2p.
You should give them a call & find out whether they are limiting p2p use, you might find that whatever you try is useless in that case

You could try using a different port, there are some ideas here
Alternative Ports
If you change ports, remember to also change port numbers allowed within the XP firewall.