Can't log in & mySQL loosing connections

[WAH]

Hallo,

I just tried to convert a MyISAM table to Innodb, when the server froze and needed to be restarted. Now, mySQL is loosing connections and I'm getting the following message, when I try to log in:

ERROR: Zend_Controller_Exception: SQLSTATE[HY000] [2002] Connection refused#0 /opt/psa/admin/externals/Zend/Db/Adapter/Pdo/Mysql.php(109): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /opt/psa/admin/externals/Zend/Db/Adapter/Abstract.php(459): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /opt/psa/admin/externals/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query(Object(Zend_Db_Table_Select), Array)
#3 /opt/psa/admin/plib/Db/Adapter/Pdo/Mysql.php(19): Zend_Db_Adapter_Pdo_Abstract->query(Object(Zend_Db_Table_Select), Array)
#4 /opt/psa/admin/externals/Zend/Db/Table/Abstract.php(1534): Db_Adapter_Pdo_Mysql->query(Object(Zend_Db_Table_Select))
#5 /opt/psa/admin/externals/Zend/Db/Table/Abstract.php(1349): Zend_Db_Table_Abstract->_fetch(Object(Zend_Db_Table_Select))
#6 /opt/psa/admin/plib/CommonPanel/Controller/Helper/Module.php(161): Zend_Db_Table_Abstract->fetchAll()
#7 /opt/psa/admin/plib/CommonPanel/Controller/Helper/Module.php(186): CommonPanel_Controller_Helper_Module::_eachModule(Object(Closure))
#8 /opt/psa/admin/plib/CommonPanel/Controller/Helper/Module.php(51): CommonPanel_Controller_Helper_Module::_eachModuleContent(Object(Closure), 'ContentInclude')
#9 /opt/psa/admin/plib/CommonPanel/Controller/Action/Abstract.php(59): CommonPanel_Controller_Helper_Module::initRendering()
#10 /opt/psa/admin/plib/Smb/Controller/Action/Abstract.php(41): CommonPanel_Controller_Action_Abstract->init()
#11 /opt/psa/admin/plib/Smb/Controller/Action/Simple.php(17): Smb_Controller_Action_Abstract->init()
#12 /opt/psa/admin/application/smb/controllers/ErrorController.php(17): Smb_Controller_Action_Simple->init()
#13 /opt/psa/admin/externals/Zend/Controller/Action.php(133): Smb_ErrorController->init()
#14 /opt/psa/admin/externals/Zend/Controller/Dispatcher/Standard.php(268): Zend_Controller_Action->__construct(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http), Array)
#15 /opt/psa/admin/externals/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#16 /opt/psa/admin/plib/Application/Web.php(38): Zend_Controller_Front->dispatch(NULL)
#17 /opt/psa/admin/htdocs/application.php(15): Plesk\Application_Web->run()
#18 {main}

Additionally, an exception has occurred while trying to report this error: Zend_Db_Adapter_Exception
SQLSTATE[HY000] [2002] Connection refused (Broker.php:336)

I appreciate any help!

Thank you,
WAH