In reply to your inquiries: ...

1. OS version? Windows XP Professional
2. What firewalls you have? McAfee AntiVirus and Firewall (followed the instructions from them on configuring firewall for LimeWire).
3. ram? 512 MB I think
4. HDD space available? Plenty...It's a 80GB hard drive and all I have on it is my reinstalled operating system, mcafee, and LimeWire really.
5. Connection type? DSL (Yahoo DSL via SBC)
6. Modem & router brand name & model numbers?
Modem: Speedstream 5100
Router: Linksys WRT54G
7. Where are you trying to connect from (home, school, work, etc.)? Home
8. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) The version of LimeWire I have is the most current one available from www.limewire.com, version 4.6.0

I tried re-downloading LimeWire, saving it to my computer and reinstalling, but that did not work either.

I don't know what else to do. I'm ready to pull my hair out. Your help thus far has been greatly appreciated.