If you can't reach the web page then that suggests something is blocking you.
Let's 1st try a different listening port for LW. Go to LW's menu Tools>Options>Advanced>Firewalls & change the listening port no. Let's try different ports to see if any of them work. Try these one by one: (a) 3500 (b) 1203 (c) 20282 (d) 80
Then see if that has any effect. Don't forget to press apply after adding each one to try. I'm not sure whether you should also try re-opening LW after each change. If not, go to menu File>Disconnect, wait a minute & then go back & select connect. Give it a good 10-15 mins to connect.
If none of the above helps then see below:
I wonder if your router is not utilising UPnP properly. I suspect if you forward a port manually, then you'll overcome your problem.
Most important is the initial setting up of a static ip, which is where most people go wrong.
I can give you a links to 2 sites so that you can double-check your settings as you go thru it.
1. Set up a static ip: (a)
Setting up a Static IP Address with the Linksys WRT54G v1.1, v2 & CA
(b)
Linksys support
2. Forward port
6346 using these instructions: (a)
Linksys WRT54Gv1.1 (b)
Linksys support
3. Within LW:
Manual port forward instructions & sample image & 2 posts after that.