Im trying to change my permalinks, but im having some problems. My permalink was ?p=123, and i want to change it to /%postname% , but it won’t let me. When i change it to /%postname% i just get 404 errors. Somehow every other format permalink is possible, except for /%postname%. The closest i get to /%postname is /index.php/%postname%, wich is working fine. How can i fix this?