I've noticed a lot of posts on this forum about "Only having one bar" or "Detecting a firewall that doesn't exist". I've got the same issue, but it's a little different.

My entire family uses this computer, and we have Windows XP, so everyone has their own account/login. We have all been using Limewire for months, and it has worked fine. However, it recently stopped connected, with the "one bar" problem, but only on ONE account. It works fine on mine, but my fathers doesn't connect at all anymore. It worked previously with the same IP, same router, etc, but now only his account is unable to connect. Any idea what would cause this?