I can't get into the admin backend after upgrading. The log-in screen redirects to 'http://www.smartrelationships.org/wp-admin/upgrade.php?_wp_http_referer=%2Fwp-admin%2F' where I get a nice message saying "WordPress has been updated! Before we send you on your way, we have to update your database to the newest version. The update process may take a little while, so please be patient." If I click on the button that says "Update", I'm redirected to 'http://www.smartrelationships.org/wp-admin/upgrade.php?step=1&backto=%2Fwp-admin%2F' which is a nice blank screen with WP logo at the top. I have tried renaming my theme and my plugin folders, but it still takes me through the same dead loop. The site is still functioning fine, but I can't get into the dashboard.