Yes that is what forums are for but we don't work for or with Limewire so don't get your knickers in a twist.

Below is a message I got from Limewire regarding upgrading. Maybe your version is too old:

Last December, we changed the way our application accessed the Gnutella network. ALL OLDER VERSIONS OF LIMEWIRE PRIOR TO 2.6 WILL NO LONGER CONNECT. You have the option of purchasing additional LimeWire Pro upgrades, or you can download the latest freeware version.