Method "controller_action_layout_generate_blocks_after" is not defined in "VES_Core_Model_Observer"

#0 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Model/App.php(1341): Mage::throwException('Method "control...')
#1 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Model/App.php(1318): Mage_Core_Model_App->_callObserverMethod(Object(VES_Core_Model_Observer), 'controller_acti...', Object(Varien_Event_Observer))
#2 /chroot/home/newgreat/new.greatvacs.com/html/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('controller_acti...', Array)
#3 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Controller/Varien/Action.php(351): Mage::dispatchEvent('controller_acti...', Array)
#4 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Controller/Varien/Action.php(269): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#5 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Cms/controllers/IndexController.php(60): Mage_Core_Controller_Varien_Action->loadLayout()
#6 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Cms_IndexController->defaultIndexAction()
#7 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('defaultIndex')
#8 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#9 /chroot/home/newgreat/new.greatvacs.com/html/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#10 /chroot/home/newgreat/new.greatvacs.com/html/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#11 /chroot/home/newgreat/usedrainbowvacuums.com/html/index.php(87): Mage::run('urv', 'website')
#12 {main}