I had same problem, limewire just couldn't detect a connection. Even though I had one. So i tried just about everything you could think of. I uninstalled it and reinstalled it several times. Did same with java. I did so many things even turned off my fire wall. Then today, I finally found a way to fix it. Here are the steps i took:

1.)Get into windows firewall settings.
2.)Click on the "advanced" tab.
3.)Go down to where it says ICMP (Internet Control Message Protocol).
And click on settings.
4.)For me, I checked all the boxes to save time. Because I didn't really
know, or care which one was stopping limewire from accessing the
internet connection. But after checking them all and clicking OK. Sure
enough, Limewire worked. About 20 seconds after I made the
Hope it helps =)

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