Problema al instalar moodle en un hosting

[aecortes70]

Alguien me puede ayudar con este error que me sale al instalar moodle en un hosting nuevo. Gracias de antemano

Error: Database connection failed

It is possible that the database is overloaded or otherwise not running properly.

The site administrator should also check that the database details have been correctly specified in config.php



Warning: mysqli::mysqli() [mysqli.mysqli]: (28000/1045): Access denied for user 'root'@'localhost' (using password: NO)