I guess my problem has something to do with uploading of the 4 files; realtimeTags.txt, wsTagsWC.php, yowindow.xml, graphs.htx. I tried to upload them manually. Before I did that, the time and date on the site at "Last updated" was 13-12-2013 16:09, and the values on the weather parameter on the current conditions was different fixed values, temperature i.e. was 6,7 C.
After uploading manually the above mentioned files, the date and time switched to 01-01-1970 01:00. The time is not moving, standing still at 01:00. The values on the weather parameters are all switched to 0,0.
On WeatherCat Preferences, on Custom Web - additional files I have put in the four files mentioned above, see attached picture.