Can you give us a total desciption of your set up:
1. OS version? (eg: Windows 98)
1 A. Windows XP Home Edition.

2. What firewalls you have?
2 A. As far as I know, I only have the one that comes with XP service pack 2.

3. How much ram?
3 A. 512 MB

4. Hard Disk space available?
4 A. 55GB available, 80GB total.

5. Connection type? (eg: dialup, broadband, cable, etc.)
5 A. Broadband.

6. Modem & router brand name & model numbers?
6 A. Motorola SB 4101 Surf Board Cable Modem.

7. Where are you trying to connect from (home, school, work, etc.)?
7 A. Home.

8. What version of Limewire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version.
8 A. I can't connect to LW, but icon on desk top shows 4.9.28. Java shows J2SE Runtime Environment 5.0 update 4 version 1.5.0.40.

9. Who is your isp provider?
9 A. Charter Communication Pipeline. I also run the AOL brower.

10. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
10 A. I have one other computer networked with this one. Running through a Linksys Wireless G broadband router model WRT 54G, but have only installed LimeWire on this one. LimeWire worked just great before I UPDATED from 4.8.1. I can't ever restore back to earlier date and get the older version to work.

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?
11 A. Your test worked is the only think on the page.

I hope this doesn't cause you too much reading, but I figured that it was the best way to answer you question. Thank You

(I have a suspicion it has something to do with a bug in the UPnP function in the LW 4.9.x versions.)