Problems after uninstalling the domain mapping plugin

I uninstalled the domain mapping plugin as I wasn't able to configure it with my site set up. Since deleting the plugin (and sunrise.php) I have had problems with my www. alias. It redirects to the login page as if it were an unrecognised subdomain. (http://riversidejunior.co.uk works fine) Could the domain mapping plugin have left something in the database that is causing this?