Try changing ports. In LW tools > optons > advanced > firewall config. Change LW's listening port to 64049 > apply > ok.

Make sure that the XP firewall is disabled...it will conflict with Norton's firewall. Don't run without a firewall on, just make sure you're only using 1 & configure it for LW.

What's the model of your Westell? It should be written on the router somewhere (look underneath too).

Something's blocking LW's default port, possibly your ISP. See if changing ports makes any difference. Have you tried to use any other p2p apps?