Error using Magento

Hey,

I want to run Magento commerce and i upgraded to inno DB and no limit of MYSQL

but I'm havong trouble using the script, I get the error message on most sites:

Codice:

---

There has been an error processing your request

Could not determine temp directory, please specify a cache_dir manually

Trace:
#0 /membri/s5scooters/lib/Zend/Cache/Backend.php(197): Zend_Cache::throwException('Could not deter...')
#1 /membri/s5scooters/lib/Zend/Cache/Backend/File.php(123): Zend_Cache_Backend->getTmpDir()
#2 /membri/s5scooters/lib/Zend/Cache.php(153): Zend_Cache_Backend_File->__construct(Array)
#3 /membri/s5scooters/lib/Zend/Cache.php(94): Zend_Cache::_makeBackend('File', Array, false, false)
#4 /membri/s5scooters/lib/Zend/Locale/Data.php(314): Zend_Cache::factory('Core', 'File', Array, Array)
#5 /membri/s5scooters/app/code/core/Mage/Core/Block/Html/Calendar.php(42): Zend_Locale_Data::getList('en_US', 'days')
#6 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Core_Block_Html_Calendar->_toHtml()
#7 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(637): Mage_Core_Block_Abstract->toHtml()
#8 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(581): Mage_Core_Block_Abstract->_getChildHtml('calendar', true)
#9 /membri/s5scooters/app/design/adminhtml/default/default/template/page/head.phtml(33): Mage_Core_Block_Abstract->getChildHtml('calendar')
#10 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(241): include('/membri/s5scoot...')
#11 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('adminhtml/defau...')
#12 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#13 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Core_Block_Template->_toHtml()
#14 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(637): Mage_Core_Block_Abstract->toHtml()
#15 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(581): Mage_Core_Block_Abstract->_getChildHtml('head', true)
#16 /membri/s5scooters/app/design/adminhtml/default/default/template/page.phtml(43): Mage_Core_Block_Abstract->getChildHtml('head')
#17 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(241): include('/membri/s5scoot...')
#18 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('adminhtml/defau...')
#19 /membri/s5scooters/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#20 /membri/s5scooters/app/code/core/Mage/Adminhtml/Block/Template.php(81): Mage_Core_Block_Template->_toHtml()
#21 /membri/s5scooters/app/code/core/Mage/Core/Block/Abstract.php(919): Mage_Adminhtml_Block_Template->_toHtml()
#22 /membri/s5scooters/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#23 /membri/s5scooters/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#24 /membri/s5scooters/app/code/core/Mage/Adminhtml/controllers/CacheController.php(48): Mage_Core_Controller_Varien_Action->renderLayout()
#25 /membri/s5scooters/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_CacheController->indexAction()
#26 /membri/s5scooters/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('index')
#27 /membri/s5scooters/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#28 /membri/s5scooters/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#29 /membri/s5scooters/app/Mage.php(354): Mage_Core_Model_App->run(Array)
#30 /membri/s5scooters/index.php(24): Mage::run('', 'store')
#31 {main}

---

it seems there is no chace pfad in Zend Cache

please help me solve theproblem