title: Can't retrieve entity config: core/store_group
body: <p>I have transfer the magento site to  another server. Fist of all I have installed fresh magento and upload the all files and folder. I have updated database as well. Previously the error was different. But I have searched in the web and fount some solution (<a href="http://www.magentocommerce.com/boards/viewthread/71051/" rel="noreferrer">http://www.magentocommerce.com/boards/viewthread/71051/</a>) and now the error coming like this.
  I have already uploaded lib/Varien/SimpleXML folder of magento 17.</p>
  
  <pre><code>Can't retrieve entity config: core/store_group
  </code></pre>
  
  <p><strong>Trace:</strong></p>
  
  <pre><code>/homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Resource.php(140): Mage::throwException('Can't retrieve ...')
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(228): Mage_Core_Model_Resource-&gt;getTableName('core/store_grou...')
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(211): Mage_Core_Model_Mysql4_Abstract-&gt;getTable('store_group')
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Mysql4/Collection/Abstract.php(83): Mage_Core_Model_Mysql4_Abstract-&gt;getMainTable()
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Mysql4/Collection/Abstract.php(69): Mage_Core_Model_Mysql4_Collection_Abstract-&gt;_initSelect()
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Config.php(790): Mage_Core_Model_Mysql4_Collection_Abstract-&gt;__construct(Object(Mage_Core_Model_Mysql4_Store_Group))
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Config.php(832): Mage_Core_Model_Config-&gt;getModelInstance('core_mysql4/sto...', Object(Mage_Core_Model_Mysql4_Store_Group))
  /homepages/20/d317798792/htdocs/imedicia/site/app/Mage.php(345): Mage_Core_Model_Config-&gt;getResourceModelInstance('core/store_grou...', Object(Mage_Core_Model_Mysql4_Store_Group))
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Abstract.php(200): Mage::getResourceModel('core/store_grou...', Object(Mage_Core_Model_Mysql4_Store_Group))
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/Abstract.php(205): Mage_Core_Model_Abstract-&gt;getResourceCollection()
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/App.php(373): Mage_Core_Model_Abstract-&gt;getCollection()
  /homepages/20/d317798792/htdocs/imedicia/site/app/code/core/Mage/Core/Model/App.php(244): Mage_Core_Model_App-&gt;_initStores()
  /homepages/20/d317798792/htdocs/imedicia/site/app/Mage.php(427): Mage_Core_Model_App-&gt;init('', 'store', Array)
  /homepages/20/d317798792/htdocs/imedicia/site/app/Mage.php(446): Mage::app('', 'store', Array)
  /homepages/20/d317798792/htdocs/imedicia/site/index.php(52): Mage::run()
  {main} 
  </code></pre>