Do this simple test for us. Using your browser go here: http://www.grc.com/port_6346.htm (Press Probe this port button) Is port 6346 open or not?

Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
2. What firewalls you have?
3. ram?
4. Hard Disk space available?
5. Connection type? (eg: dialup, broadband, cable, etc.)
6. Modem & router brand name & model numbers?
7. Where are you trying to connect from (home, school, work, etc.)?
8. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.
9. Who is your isp provider?
10. Is this a your 1st try at LW or is this a new problem with an experienced user.
11. Do you try to connect using LW whilst you're using the other p2p programs?

12. When you said you have opened the correct port, what do you mean? Did you forward a port on your modem/router?