Try an experiment, try downlding a magnet link from here: http://www.magnetmix.com/video.shtml
Tell us what happens.

Can you also tell us these details:

1. What firewalls you have?
2. How much ram?
3. Hard Disk space available?
4. Connection type? (eg: dialup, broadband, cable, etc.)
5. Modem & router brand name & model numbers?
6. Where are you trying to connect from (home, school, work, etc.)?
7. What version of Limewire (LW) & Java do you have? (Go to menu bar>Limewire>About LW...) Will show both LW & Java version.
8. Who is your isp provider (Internet Service Provider)?
9. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
10. After LW's been open at least 15 mins, do this test: Bug Report instructions & sample image Is the result True/False?
11. 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?