Warning: require_once(Zend/Cache/Backend/ExtendedInterface.php): failed to open stream: No such file or directory in C:\Apache24\htdocs\library\Zend\Cache\Backend\Test.php on line 27

Fatal error: require_once(): Failed opening required 'Zend/Cache/Backend/ExtendedInterface.php' (include_path='.;C:\php\pear') in C:\Apache24\htdocs\library\Zend\Cache\Backend\Test.php on line 27