"Slow fix" for when you can't login to your site with PN .714, and you get a 404 page not found error afterwards 1) Go to your homepage with your browser, and do a View HTML Source 2) Look for a hidden field with name="url" value="..." somewhere in the HTML code for the Login block 3) Check the value of that hidden field, and compare it with the correct URL for your homepage 4) If it contains some extra path information in front of your own URL, see the "fix" for Lycos sites. 5) If it contains the right URL, try again and see if it's not trying to send you to an https:// site instead of your regular http:// site. If so, replace the string 'https' with 'http' in /includes/pnAPI.php (typical for IIS). Or if it's trying to send you to some totally different site, your webserver configuration is probably pretty weird. Go to step 7... 6) If it's empty, you're in trouble because your webserver doesn't seem to fill in the REQUEST_URI environment variable, or it doesn't make it available in the "usual" way. 7) Create a file called info.php with the following line in it : Upload this file to the same directory where the PostNuke index.php, user.php etc. files are located, and have a look at it with your browser. Check the webserver information, the PHP version and the settings for register_globals to make sure it's turned "On". Also have a look to see if HTTP_HOST and REQUEST_URI are given some correct values, and post all this information (together with your URL) at the support forum for "PostNuke .71 Issues" : http://www.postnuke.com/modules.php?op=modload&name=PN_Cyboards&file=forum&board=22 Give your post a title like "Can't login - gives 404 error" or something like that, so that we know what it's about :-) For more tips and tricks, see Mike's Pub