1. OS version? Windows XP Media Center Edition 2005
2. What firewalls you have? Windows Firewall
3. How much ram? 2GB
4. Hard Disk space available? 80GB
5. Connection type? ADSL
6. Modem & router brand name & model numbers? Linksys WAG200G
7. Where are you trying to connect from ? Home
8. What version of LimeWire (LW) & Java do you have? Limewire 4.17.0 Pro and Java 1.6.0_02
9. Who is your ISP provider? Telstraclear (New Zealand)
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? "Your Test Worked"
11. Are you sharing the connection with other computers or p2p sharing programs? The only other thing sharing the network is my sister's laptop.
12. Is this a your 1st try at LW or is this a new problem with an experienced user? I have been using limewire for 2 years and this problem has only occurred as of today.
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? Yes
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? It used to be UPnP enabled but since I haven't been able to connect I tried port forwarding and still can't connect.
15. What security programs are you using (antivirus etc)? Well I have nod32 and spybot and thats about it...
16. What country are you living in? Sometimes there are ISPs with the same name in more than one country? New Zealand

I've been googling this all day and I've done all the things people have said.. e.g. Restart router, check firewalls, reinstall limewire etc. but none of this has succeeded.