The page displays "Your test worked!"
I only have the one firewall, windows firewall.
I use a dial up connection on both computers.
I don't have a router, and my modem is a simple 56k modem, internal.
I'm just trying to connect from home.
I have Limewire PRO 4.10.0 Pro and Java 1.5.0_03.
I'm through Primus.
Well I do sometimes connect the two computers via a LAN setup. It's a blue cord, not crossover. Then the internet is shared between the two with the laptop being the primary internet source. Usually I connect the two computers separately cause dial up is a little sluggish. On both occasions the laptop cannot connect to limewire.
I checked the UPnP settings on my dial up connection. They weren't enabled, so I have enabled them and nothing changed. So I changed the setting back to how they were.

Symantic Antivirus was causing the same issue for me, I just had to disable auto-protect..........and a connection started. You may/may not have that software running on your PC, but if so - try the disable.