This error message usually basically means "I can find your database, but I don't know what you're referring to" in other words you're using the wrong uri to access your admin area.
Look in settings/siteaccess/ to see what directories you have, you should find some that are something along the lines of user/ admin/ news/ news_admin/.
Try adding news_admin/ onto the end of your address i.e. http://www.pswebmin.org/ez/index.php/news_admin/
If this doesn't work check your httpd.conf to see if you have virtual hosting on. If you do add news_admin onto the end of your virtual host address. e.g. http://www.pswebmin.org/ez/news_admin (assuming your virtual host address is http://www.pswebmin.org/ez/).
Hope this works, or helps lead you to the answer ;)