SQLSTATE[HY000] [2002] Connection refused

#0 /data/home/wwwroot/default/it/lib/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /data/home/wwwroot/default/it/lib/Varien/Db/Adapter/Pdo/Mysql.php(396): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /data/home/wwwroot/default/it/lib/Zend/Db/Adapter/Abstract.php(460): Varien_Db_Adapter_Pdo_Mysql->_connect()
#3 /data/home/wwwroot/default/it/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#4 /data/home/wwwroot/default/it/lib/Varien/Db/Adapter/Pdo/Mysql.php(504): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#5 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/Resource.php(179): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#6 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/Resource.php(110): Mage_Core_Model_Resource->_newConnection('pdo_mysql', Object(Mage_Core_Model_Config_Element))
#7 /data/home/wwwroot/default/it/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(558): Mage_Core_Model_Resource->getConnection('core_read')
#8 /data/home/wwwroot/default/it/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(311): Amasty_Fpc_Model_Fpc_Front::_getDbConfig('amfpc/pages/ign...')
#9 /data/home/wwwroot/default/it/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(342): Amasty_Fpc_Model_Fpc_Front->containsIgnoredParams()
#10 /data/home/wwwroot/default/it/app/code/local/Amasty/Fpc/Model/Fpc/Front.php(842): Amasty_Fpc_Model_Fpc_Front->ignore()
#11 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/Cache.php(687): Amasty_Fpc_Model_Fpc_Front->extractContent(false)
#12 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/App.php(351): Mage_Core_Model_Cache->processRequest()
#13 /data/home/wwwroot/default/it/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#14 /data/home/wwwroot/default/it/index.php(84): Mage::run('', 'store')
#15 {main}