Hi had exactly the same problem and went through all the same reconfiguring etc it drove me mad.
I then did this go to start-run-type in "services.msc" and look for any firewalls I only had the windows firewall and although I had already gone thro' all the usual stuff disable etc etc I decided to highlight it and 'stop' it having noted that I could restart it. I then went back into LW and it worked purrrfecly I then went back into the registry and restarted it and all is still ok.
all the best
LITTLE IMP