Since the two computers were identical except for the operating system I assumed that the problem was just that the operating system, but the deatials as best as I can give are as follows:

1. OS version? VISTA
2. What firewalls you have? What comes with VISTA
3. How much ram? 2046MB
4. Hard Disk space available? Disk 1 96 GB and Disk 2 101 GB
5. Connection type? (eg: dialup, broadband, cable, etc.) ADSL
6. Modem & router brand name & model numbers? Router Paradyne Model 6212-13-200-08A
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)? Home Office
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. Limewire 4.10.9 pro; Java 1.6.0_01
9. Who is your ISP provider (Internet Service Provider)? Cable & Wireless (Caribsurf)
10. 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? I get the message "Your test worked"
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Yes the router shares the internet connection with three computers on LAN and one on wireless
12. Is this a your 1st try at LW or is this a new problem with an experienced user. New problem
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface?YES
http://www.gnutellaforums.com/attach...1&d=1158099342
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? Do not know

I am also using Kyspersky anti-virus version 6.0.2.621 but as indicated this is also being used on the same set system but with the XP SP2.