Error 503 Service Unavailable

Service temporary unavailable (database connection problem).
Our apologies for any inconvenience this may cause.
We appreciate your patience and invite you to return soon.
2002 : Connection refused


Fatal error: Uncaught --> Smarty: Unable to load template 'file:error-404.tpl' <-- thrown in /home/megapro/public_html/includes/smarty/sysplugins/smarty_internal_template.php on line 195