First, thanks for taking up on this issue.
My wireless connection to the WPA secure base at home has suddenly stopped functioning. I still DO get connected to the network (using the correct password) but the browser does not work. This is while when I connect to one of the neighbors unsecured networks everything works. (Although here too I suddenly get disconnected or the signal strength decreases significantly and then comes back.) By the way, when I connect to LAN (ethernet) everything works perfectly.
Thanks a lot for you help,