Try using this utility to help clean your system: CCleaner - Home

McAffee & XP firewall do not work well together. Delete your XP firewall rule for LW & redo it. Windows Firewall - LimeWire. Then try running LW again. Give it a good 20 mins to try to connect.

If no good then: Try installing FrostWire (click on link) & try running FW to see if that runs. If yes, then close it & run LW.

If still problems, can you supply these details: System details - help us to help you (click on blue link)