Warning: require_once(__DIR__/../Annotation.php) [function.require-once]: failed to open stream: No such file or directory in /home/babak/symfony/2/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php on line 20

Fatal error: require_once() [function.require]: Failed opening required '__DIR__/../Annotation.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/babak/symfony/2/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php on line 20