Problema con magento

[dba_narez]

Hola estimados!
les cuento que estaba todo funcionando re bien con este sistema hasta que de un momento a otro empece a tener este error y no m deja entrar a administrar.

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away
Trace:
#0 /home/hbantena/public_html/lib/Zend/Db/Statement.php(283): Zend_Db_Statement_Pdo->_execute(Array)
#1 /home/hbantena/public_html/lib/Zend/Db/Adapter/Abstract.php(457): Zend_Db_Statement->execute(Array)
#2 /home/hbantena/public_html/lib/Zend/Db/Adapter/Pdo/Abstract.php(230): Zend_Db_Adapter_Abstract->query('SELECT `adminno...', Array)
#3 /home/hbantena/public_html/lib/Varien/Db/Adapter/Pdo/Mysql.php(281): Zend_Db_Adapter_Pdo_Abstract->query('SELECT `adminno...', Array)
#4 /home/hbantena/public_html/lib/Zend/Db/Adapter/Abstract.php(687): Varien_Db_Adapter_Pdo_Mysql->query(Object(Varien_Db_Select), Array)
#5 /home/hbantena/public_html/app/code/core/Mage/AdminNotification/Model/Mysql4/Inbox.php(85): Zend_Db_Adapter_Abstract->fetchRow(Object(Varien_Db_Select))
#6 /home/hbantena/public_html/app/code/core/Mage/AdminNotification/Model/Inbox.php(101): Mage_AdminNotification_Model_Mysql4_Inbox->parse(Object(Mage_AdminNotification_Model_Inbox ), Array)
#7 /home/hbantena/public_html/app/code/core/Mage/AdminNotification/Model/Feed.php(97): Mage_AdminNotification_Model_Inbox->parse(Array)
#8 /home/hbantena/public_html/app/code/core/Mage/AdminNotification/Model/Observer.php(47): Mage_AdminNotification_Model_Feed->checkUpdate()
#9 /home/hbantena/public_html/app/code/core/Mage/Core/Model/App.php(1239): Mage_AdminNotification_Model_Observer->preDispatch(Object(Varien_Event_Observer))
#10 /home/hbantena/public_html/app/Mage.php(303): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#11 /home/hbantena/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(454): Mage::dispatchEvent('controller_acti...', Array)
#12 /home/hbantena/public_html/app/code/core/Mage/Adminhtml/Controller/Action.php(130): Mage_Core_Controller_Varien_Action->preDispatch()
#13 /home/hbantena/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(365): Mage_Adminhtml_Controller_Action->preDispatch()
#14 /home/hbantena/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(248): Mage_Core_Controller_Varien_Action->dispatch('index')
#15 /home/hbantena/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http) )
#16 /home/hbantena/public_html/app/Mage.php(459): Mage_Core_Controller_Varien_Front->dispatch()
#17 /home/hbantena/public_html/index.php(65): Mage::run()
#18 {main}