将应用程序移动到另一台主机后出现此错误。它在本地工作，没有任何问题，但问题是在移动到虚拟主机后开始的。请告诉我我做错了什么。
pdo_mysql extension is not installed
Trace:
#0 D:\Hosting\11486590\html\shopping\magento\lib\Zend\Db\Adapter\Abstract.php(459): Varien_Db_Adapter_Pdo_Mysql->_connect()
#1 D:\Hosting\11486590\html\shopping\magento\lib\Zend\Db\Adapter\Pdo\Abstract.php(238): Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array)
#2 D:\Hosting\11486590\html\shopping\magento\lib\Varien\Db\Adapter\Pdo\Mysql.php(419): Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array)
#3 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource.php(169): Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8')
#4 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource.php(110): Mage_Core_Model_Resource->_newConnection('pdo_mysql', Object(Mage_Core_Model_Config_Element))
#5 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource\Db\Abstract.php(320): Mage_Core_Model_Resource->getConnection('core_write')
#6 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource\Db\Abstract.php(350): Mage_Core_Model_Resource_Db_Abstract->_getConnection('write')
#7 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource\Db\Abstract.php(335): Mage_Core_Model_Resource_Db_Abstract->_getWriteAdapter()
#8 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Resource\Cache.php(53): Mage_Core_Model_Resource_Db_Abstract->_getReadAdapter()
#9 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Cache.php(455): Mage_Core_Model_Resource_Cache->getAllOptions()
#10 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Cache.php(497): Mage_Core_Model_Cache->_initOptions()
#11 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\App.php(1183): Mage_Core_Model_Cache->canUse('config')
#12 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Config.php(414): Mage_Core_Model_App->useCache('config')
#13 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\Config.php(294): Mage_Core_Model_Config->_canUseCacheForInit()
#14 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\App.php(413): Mage_Core_Model_Config->loadModulesCache()
#15 D:\Hosting\11486590\html\shopping\magento\app\code\core\Mage\Core\Model\App.php(343): Mage_Core_Model_App->_initModules()
#16 D:\Hosting\11486590\html\shopping\magento\app\Mage.php(683): Mage_Core_Model_App->run(Array)
#17 D:\Hosting\11486590\html\shopping\magento\index.php(87): Mage::run('', 'store')
#18 {main}