I have the EXACT same problem. I did everything i know to my knowledge to allow limewire to run, but i still get that error message. Limewire won't even open up, that just pops up and limewire quits itself. I even turn off my firewall completely, and it still doesn't work. Here is my info:

1. Q. OS version?
A. Windows XP Home
2. Q. What firewalls you have?
A. Only the Windows Firewall
3. Q. How much ram?
A. 512 MG
4. Q. Hard Disk space available?
A. 20 or 30 Gigs left (60 GB Total)
5. Q. Connection type?
A. Cable (Optimum online)
6. Modem & router brand name & model numbers?
A. D-Link DI-614+
7. Where are you trying to connect from?
A. Home
8. What version of Limewire (LW) & Java do you have?
A. LW 4.9.28
9. Who is your isp provider?
A. Dont know. Optimum online i guess
10. Are you sharing the connection with other computers or p2p sharing programs?
A. I have a wireless connection to my router. It's shared by one other computer.
11. Is this a your 1st try at LW or is this a new problem with an experienced user.
A. Well, my old version of limewire worked, but once i updated it, it stopped working. I've never had the new version work.

Hope this is all right, and i really hope u can help me and anyone else with this problem. Thanks soooooo much. Please respond, even if u can't fix it, just so i know u read this.

P.S. Btw, i did the test that was posted, and to my surprise, IT WORKED!? That's really weird bcuz the test worked but limewire won't. I'm really confused.