Hmm it could be your isp provider putting a filter on your speeds or just totally blocking LW. Some isp's will do this if they detect you using large amounts of bandwidth. See ISP's known to BLOCK or Filter p2p or specifically Limewire

Who is your internet service provider?

* Do this simple test for us. Using your browser go here: http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?

What you can try are:

1. Try deleting your LW Preferences folder whilst LW is closed; instructions here: Fixes for Limewire

2. Change the port LW uses. Go to LW's menu Tools>Options>Advanced>Firewall & change the listening port from 6346 to another like these: 3500, 1203, 80, 20282, or 443. After changing press the apply button. I'm not sure whether you'll need to close & re-open LW, but you can try File>Connect/Disconnect & connect. Then give LW ample time to connect & settle down.