Well, with the phrase; have verified that those web sites are up and running, I meant to say that I have connected to the site from another pc, also running eCS and Seamonkey, but with another internet connection and it works fine.
Pls try
www.superdekk.no and I think it will load as expected.
After my first post, I tried to load that web page on another pc using the Cisco SDSL and it has the same problems.
Since I also have trouble with file transfers after I got this new Cisco hardware I believe the problem is a configuration issue with the router. I have reported this to those who set it up and they are working on it. So far they haven't found anything wrong, but at least I think that this excludes the pc's/software from being the source of the problems.
Also, everything was working fine with ADSL before it was changed to this SDSL connection.