I too am having this problem...

1. OS version? Windows XP Home SP2.
2. What firewalls you have? Windows and the firmware one in my router
3. How much ram? 2.5gb
4. Hard Disk space available? 490gb
5. Connection type? broadband
6. Modem & router brand name & model numbers? dsl modem (motorola pppoe setup) and netgear wgr614 v.3
7. Where are you trying to connect from? house
8. What version of LimeWire (4.18.3) & Java do you have? (1.6.0_05)
9. Who is your ISP (Internet Service Provider)? ATT/Yahoo
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? my test worked
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up. Not a the moment my server is run through the router ...
12. Is this a your 1st try at LW or is this a new problem with an experienced user. newish problem with a long time user... i dont know if im all that expierenced...lol, i would say in the last few months it started.
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? yes i do andhave checked and lime wire is on the exceptions list in the windows fire wall...
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 and i have tried port forwarding .... my modem is setup in PPPoE mode and my router is acting as the dialer...
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall AVG doesnt include the fire wall i have checked.
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). USA

after installing the newist version the problem persisted, i was unable to establish a connection, the connection indicator shows 'you are currently connecting to the network' this is as far as this goes...

any help would be very helpful.
J.Fender