Scripts external to WordPress cause 404 errors
My money would be on the .htaccess of your root directory is trying to route the /docuwiki request through WordPress, which is why it is failing. Your .htaccess file should look something like this: <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule>