Well, i've done this fix before.

Deleted .limewire and Limewire in Application data about a months ago when i had a problem exactly like this (not loading up at all, limewire load box pops up then disappears and nothing happens) but now i have no .limewire folder in my documents and settings to delete!

delete the application data limewire ok, but it still doesn't fix it. Reinstalled limewire and all my java stuff to get the recommended version and nada.

Oh im using Windows XP btw.

Any help would be much appreciated