Tamir, Jupz, jewelsweb & chrisfla each need to provide these details: System details - help us to help you (click on blue link)

First place to check for fixes are: (1) If LW Will Not Connect (click on the blue link) & try a combination of those.

(2) Make sure your firewall has LW as an exception: Setting up an exception for LimeWire in your software firewall (click in link)