For those of you who do not have LW Pro, you can try an older version Download LimeWire Basic 4.16.6 - FileHippo.com or 4.16.3 should be reliable.

But you will still need to make an exception for LimeWire (LW) in the XP firewall. And if using a router then you will need to tell us which brand & model if still problems. And sometimes when using a different version of LW, you need to remove the previous firewall rule setting & re-add it for the other version. See more about setting up XP firewall here User Cant Connect - LimeWire

Manual instructions for setting up XP firewall here: Windows Firewall - LimeWire