Migrating a wiki problem

I had to move my wiki from old hosting to a new one, and here are the results — the 404 page. I've seen this guide but I'm not sure what I've done wrong. I downloaded the whole database, exported mySQL dump via PHPMyAdmin, uploaded the database on a new host, imported the sql dump, edited the LocalSettings.php file. What have I done wrong? What haven't I done to make it work? Thanks.