I installed Organize Series on our blog but after activating there were several problems so I deleted the plugin – turns out, our PHP is only 5.1. Still, there's no way to access the pages, every time you try, the main page shows up. Individual entries work fine, though. I installed the plugin again and tried getting on our pages and then there's the 404 Not Found error. Deactivating or deleting the plugin -> back to looking at the main page. I also tried using another theme and reinstalling WordPress but to no avail. Are there some remains left from Organize Series? Or do I have to fix the mysql-tables??