Warning: require_once(Zend/Db/Table/Row/Abstract.php): failed to open stream: No such file or directory in C:\Apache24\htdocs\library\Zend\Db\Table\Row.php on line 27

Fatal error: require_once(): Failed opening required 'Zend/Db/Table/Row/Abstract.php' (include_path='.;C:\php\pear') in C:\Apache24\htdocs\library\Zend\Db\Table\Row.php on line 27