Warning: mysql_pconnect(): Host 'group.kikirpa.be' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' in /home/projects/pp/classes/DBController.class.php on line 18

Fatal error: Uncaught exception 'DBException' with message 'Database connection failed!<br>Host 'group.kikirpa.be' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'<hr>' in /home/projects/pp/classes/DBController.class.php:20
Stack trace:
#0 /home/projects/pp/classes/DBController.class.php(11): DbController->__construct()
#1 /home/projects/pp/classes/BHIND.class.php(256): DbController::getInstance()
#2 /home/projects/pp/search/index.php(3): BHIND::appText('QUICKSEARCH')
#3 {main}
  thrown in /home/projects/pp/classes/DBController.class.php on line 20