Gnutella Forums - I'm not getting any search results!

I have been using Limewire for a few years now, the basic version, and have always upgraded the new versions so that it works best. However, for about a month or two, everytime I try to search Limewire, it doesn't obtain any search results whatsoever. Searches which before obtained lots of results now do not fetch anything. Help? Also some of the things down below I'm not sure of, because this isn't my computer, it's my dad's.

1. OS version? Windows XP
2. What firewalls you have? AVG & Adaware I think.
3. How much ram? not sure.
4. Hard Disk space available? 42.5 GB
5. Connection type? (eg: dialup, broadband, cable, etc.) broadband
6. Modem & router brand name & model numbers? not sure :\
7. Where are you trying to connect from (home, school, work, etc.)? home.
8. What version of LimeWire (LW) & Java do you have? LW: 4.18.3 Java: 1.5.0_04
9. Who is your ISP provider (Internet Service Provider)? Microwoft Internet Explorer
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? It says "your test worked".
11. Are you sharing the connection with other computers or p2p sharing programs? no.
12. Is this a your 1st try at LW or is this a new problem with an experienced user. new problem with experienced user.
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? I'm not sure about any of this.
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall. AVG & Adaware.
16. What country are you living in? Sometimes there are ISPs with the same name in more than one country (eg Clearwire in the USA & also in Ireland). UK [England]