title: dbModel read resource does not implement Zend_Db_Adapter_Abstract
body: <p>i am facing a situation where i can't find any solution. My website was working fine till i installed a new extension. After installing this extension my website and admin panel is not working. Actually i have installed lower version extension because i didn't noticed version and installed. </p>
  
  <p>I am getting this stack trace :-</p>
  
  <pre><code>dbModel read resource does not implement Zend_Db_Adapter_Abstract
  
  Trace:
  #0 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/Resource/Db/Collection/Abstract.php(134): Varien_Data_Collection_Db-&gt;setConnection(false)
  #1 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/Config.php(1348): Mage_Core_Model_Resource_Db_Collection_Abstract-&gt;__construct(Object(Mage_Core_Model_Resource_Website))
  #2 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/Config.php(1380): Mage_Core_Model_Config-&gt;getModelInstance('core_resource/w...', Object(Mage_Core_Model_Resource_Website))
  #3 /home/krishangrover/public_html/app/Mage.php(491): Mage_Core_Model_Config-&gt;getResourceModelInstance('core/website_co...', Object(Mage_Core_Model_Resource_Website))
  #4 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/Abstract.php(208): Mage::getResourceModel('core/website_co...', Object(Mage_Core_Model_Resource_Website))
  #5 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/Abstract.php(213): Mage_Core_Model_Abstract-&gt;getResourceCollection()
  #6 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/App.php(608): Mage_Core_Model_Abstract-&gt;getCollection()
  #7 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/App.php(466): Mage_Core_Model_App-&gt;_initStores()
  #8 /home/krishangrover/public_html/app/code/core/Mage/Core/Model/App.php(349): Mage_Core_Model_App-&gt;_initCurrentStore('', 'store')
  #9 /home/krishangrover/public_html/app/Mage.php(684): Mage_Core_Model_App-&gt;run(Array)
  #10 /home/krishangrover/public_html/index.php(87): Mage::run('', 'store')
  #11 {main}
  </code></pre>
  
  <p>I have done all the solution but no one is working. i have searched over google and searched on stackoverflow also. But no solution is working.</p>