Multisite – Hostgator addon domain

Hi,
I would like to enable multi-site in an addon domain on Hostgator servers. While following all the instructions, but I can’t access (login): “One or more database tables are not available. The database may need to repair”.
file wp-content.php

define('WP_ALLOW_MULTISITE', true);
define( 'SUBDOMAIN_INSTALL', false );
$base = '/';
define( 'DOMAIN_CURRENT_SITE', 'mysite.com' );
define( 'PATH_CURRENT_SITE', '/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

I have to make some changes, right?
Thank you
Cristiano (Italy)