Hi there

I've just started to experience this connection issue today (15.5.07 ) - I tried various posts above ( removing Java updates, deleting the limewire directory etc ) but none worked for me , so I started to look at this issue in greater depth as I am luckily an iT Specialist.

My issue is soley down to a new Windows update that I install on a particular PC only today !

When I removed this "update" Limewire worked immediately !

The Windows update in question was...

Security Update for Windows XP (KB931261)
A security issue has been identified in Universal Plug and Play that could allow an attacker to compromise your Windows-based system and gain control over it.

Try this solution by use of the add/remove option naturally in your Control Panel, should you find like me, having tried the other solutions posted here that LW still doesnt connect

Hope this helps
RW