Mahara: Site unavailable

Mahara could not connect to the application database.

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* If you are the administrator, please check your database settings and make sure your database is available

The error received was:
mysql error: [1129: Host 'ifigeneia.cti.gr' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'] in CONNECT(mysql-dek.cti.gr, 'admin', '****', pakeep_mahara)