I follow u suggestion to make a try LW on new account.
Same: it can't connect.
I spend long time on phone with my provider. There is indeed an other FW installed to his server, but he says, if I was able to connect before, I should be able to connect again, no change have been made (same as me on my iMac !)
I indicate the ports LW/prefs and Sharing/FW/prefs was using, he says those ports was free and not block by his server FW (?)...
Since I still not able to connect, he will send someone home to check...
LW version you advise to try need a new Java version available for OX 10.4xx. AM on OS 10.3.9 !