Probleme avec magento

j'ai ce problème sur mon site ne veux pas marcher

SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (111)
Trace:
#0 /home/ldtendan/www/lib/Varien/Db/Adapter/Pdo/Mysql.php(211): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /home/ldtendan/www/lib/Zend/Db/Adapter/Abstract.php(441): Varien_Db_Adapter_Pdo_Mysql->_connect()
#2 /home/ldtendan/www/lib/Zend/Db/Adapter/Pdo/Abstract.php(230): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#3 /home/ldtendan/www/lib/Varien/Db/Adapter/Pdo/Mysql.php(281): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#4 /home/ldtendan/www/app/code/core/Mage/Core/Model/Resource/Type/Db/Pdo/Mysql.php(45): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#5 /home/ldtendan/www/app/code/core/Mage/Core/Model/Resource.php(87): Mage_Core_Model_Resource_Type_Db_Pdo_Mysql->getConnection(Object(Mage_Core_Model_Config_Element))
#6 /home/ldtendan/www/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(255): Mage_Core_Model_Resource->getConnection('core_read')
#7 /home/ldtendan/www/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(270): Mage_Core_Model_Mysql4_Abstract->_getConnection('read')
#8 /home/ldtendan/www/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(290): Mage_Core_Model_Mysql4_Abstract->_getReadAdapter()
#9 /home/ldtendan/www/app/code/core/Mage/Core/Model/Mysql4/Collection/Abstract.php(68): Mage_Core_Model_Mysql4_Abstract->getReadConnection()
#10 /home/ldtendan/www/app/code/core/Mage/Core/Model/Config.php(1086): Mage_Core_Model_Mysql4_Collection_Abstract->__construct(Object(Mage_Core_Model_Mysql4_Website))
#11 /home/ldtendan/www/app/code/core/Mage/Core/Model/Config.php(1119): Mage_Core_Model_Config->getModelInstance('core_mysql4/web...', Object(Mage_Core_Model_Mysql4_Website))
#12 /home/ldtendan/www/app/Mage.php(347): Mage_Core_Model_Config->getResourceModelInstance('core/website_co...', Object(Mage_Core_Model_Mysql4_Website))
#13 /home/ldtendan/www/app/code/core/Mage/Core/Model/Abstract.php(200): Mage::getResourceModel('core/website_co...', Object(Mage_Core_Model_Mysql4_Website))
#14 /home/ldtendan/www/app/code/core/Mage/Core/Model/Abstract.php(205): Mage_Core_Model_Abstract->getResourceCollection()
#15 /home/ldtendan/www/app/code/core/Mage/Core/Model/App.php(405): Mage_Core_Model_Abstract->getCollection()
#16 /home/ldtendan/www/app/code/core/Mage/Core/Model/App.php(268): Mage_Core_Model_App->_initStores()
#17 /home/ldtendan/www/app/Mage.php(434): Mage_Core_Model_App->init('default', 'store', Array)
#18 /home/ldtendan/www/app/Mage.php(455): Mage::app('default', 'store', Array)
#19 /home/ldtendan/www/index.php(65): Mage::run('default')
#20 {main}