Mahara: Site unavailable

Mahara could not connect to the application database.

* If you are using Mahara, please wait a minute and try again
* If you are the administrator, please check your database settings and make sure your database is available

The error received was:
mysqli error: [2002: Permission denied] in CONNECT(localhost, 'host5_simi_edu_vn_3kgqN_rmssimiswissch', '****', host5_simi_edu_vn_3kgqN_rmssimiswissch)