Hi, I can no longer connect in Limewire, and seem to have exhausted all the potential tests (see answers below). I called Sky (my ISP) to ask if they blocked peer-to-peer connections and they hadn't the slightest idea what I was talking about. Have tried deleting all Limewire files and re-installing with no success. Any more ideas?

1. OS version? (eg: Windows 98)
Mac OS X 10.4.11

2. What firewalls you have?
No software firewalls active, one active in router

3. How much ram?
2GB SDRAM

4. Hard Disk space available?
32GB

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

6. Modem & router brand name & model numbers?
Netgear Super Wireless ADSL Router DG834GT

7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)?
House

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 4.14.12, Java 1.5.0_07

9. Who is your ISP (Internet Service Provider)?
SKY

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?
Test worked

11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
No other computers, have Phex installed but the problem existed prior to installation and its not currently running

12. Is this a your 1st try at LW or is this a new problem with an experienced user.
LimeWire was working on another computer (eMac) in the same set up and location, have since migrated to new iMac and problem has started. However, I hadn't opened Limewire in a long time so I couldn't say whether the migration was related to the problem.

13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? _ click here to see Sample image
Yes, and one single green bar on the connection status with caption "you are currently connecting to the network"

14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled?
UPnP is enabled

15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall
None that I'm aware of

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 (London)