If that didn't work then you either have a dynamic IP and it changed on you or your setup is not correct.

Do you have a Brick wall in front of the globe (Firewalled) on either your comp or the computer your trying to access your files with?

If you aren't having firewall trouble then the correct IP+Port should be displayed just above where you enter the number. Make sure that Limewire picks up the correct IP.

Also please give a bit more details on your system like eg. Operating system and whether you use Portforwarding or UPnP to bypass your firewall.