I have tried all the suggestions, nothing worked.
Since purchasing the LW pro for my daughters laptop 2+ months ago it has never connected.
here are the system details I have:-

1. OS version? Windows Vista, Administrator
2. What firewalls you have? norton
3. How much ram? 2gb
4. Hard Disk space available? 200gb
5. Connection type? broadband
6. Modem & router brand name & model numbers? echolife HG520s
7. Where are you trying to connect . house
8. What version 4.18.3pro java 1.6.0_07
9. Who is your ISP talktalk
10. Do this simple test for us. didn't work
11. Are you sharing the connection None
12. Is this a your 1st try at LW . use an older version on another computer at home and it works fine.
13. Do you see a brick wall in front of the blue world icon ? yes
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? dont understand?
15. What security programs are you using (antivirus etc)? norton 360
16. What country are you living in? UK.
17. Has anything in your setup changed recently? LW has not connected since it was purchased and loaded.

I'm sure it's something easy to fix, but we can't do it without help.
regards,
emma