You can try these:
Fixes for Limewire & make sure your Java is up to date (1.5.)
Did you configure your firewalls to allow LW access?:
http://www.limewire.com/english/content/firewalls.shtml
Can you give us a total desciption of your set up:
1. OS version? (eg: Win 98)
2. What firewalls you have?
3. ram?
4. HDD space available?
5. Connection type? (eg: dial up, cable, broadband, etc.)
6. Modem & router brand name & model numbers?
Do this simple test for us. Using your browser go here:
http://www3.limewire.com:6346/ The page should say ‘Test Page was a Success’. What happens when you go there?