Well you can apply at least 2 fixes that apply to the new version of LW to see if that helps: Fixes for Limewire But as you suggested it does sound like something else.

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. HDD 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
Java do you have? (Go to LW's menu Help>About LW...)
These details are vital if you want us to find out what your connection problem is.
9. Who is your ISP? (some block or filter p2p or specifically LW)