500 Internal Server Error.

exception 'PDOException' with message 'SQLSTATE[HY000] [2005] Unknown MySQL server host 'mysql530.in.shared-server.net' (1)' in /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/pdo/connection.php:96
Stack trace:
#0 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/pdo/connection.php(96): PDO->__construct('mysql:host=mysq...', 'QSPVsCPZhx600', '35SiP9dnFBWy', Array)
#1 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/pdo/connection.php(460): Fuel\Core\Database_PDO_Connection->connect()
#2 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/connection.php(523): Fuel\Core\Database_PDO_Connection->escape('2')
#3 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query/builder.php(135): Fuel\Core\Database_Connection->quote('2')
#4 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query/builder/select.php(440): Fuel\Core\Database_Query_Builder->_compile_conditions(Object(Fuel\Core\Database_PDO_Connection), Array)
#5 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query.php(259): Fuel\Core\Database_Query_Builder_Select->compile(Object(Fuel\Core\Database_PDO_Connection))
#6 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/app/classes/model/facility.php(72): Fuel\Core\Database_Query->execute()
#7 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/app/classes/controller/facility/kamijima.php(9): Model_Facility::get_from_id('2')
#8 [internal function]: Controller_Facility_Kamijima->action_index()
#9 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/request.php(444): ReflectionMethod->invokeArgs(Object(Controller_Facility_Kamijima), Array)
#10 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/index.php(53): Fuel\Core\Request->execute()
#11 {main}

Next exception 'Fuel\Core\Database_Exception' with message 'SQLSTATE[HY000] [2005] Unknown MySQL server host 'mysql530.in.shared-server.net' (1)' in /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/pdo/connection.php:113
Stack trace:
#0 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/pdo/connection.php(460): Fuel\Core\Database_PDO_Connection->connect()
#1 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/connection.php(523): Fuel\Core\Database_PDO_Connection->escape('2')
#2 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query/builder.php(135): Fuel\Core\Database_Connection->quote('2')
#3 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query/builder/select.php(440): Fuel\Core\Database_Query_Builder->_compile_conditions(Object(Fuel\Core\Database_PDO_Connection), Array)
#4 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/database/query.php(259): Fuel\Core\Database_Query_Builder_Select->compile(Object(Fuel\Core\Database_PDO_Connection))
#5 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/app/classes/model/facility.php(72): Fuel\Core\Database_Query->execute()
#6 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/app/classes/controller/facility/kamijima.php(9): Model_Facility::get_from_id('2')
#7 [internal function]: Controller_Facility_Kamijima->action_index()
#8 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/fuelphp/core/classes/request.php(444): ReflectionMethod->invokeArgs(Object(Controller_Facility_Kamijima), Array)
#9 /home/users/web06/9/9/0215799/www.wellnesssupport.jp/index.php(53): Fuel\Core\Request->execute()
#10 {main}