Error calling J4SCHEMA component in Joomla

get the error

Warning: require_once(__DIR__/autoloader/fof.php) [function.require-once]: failed to open stream: No such file or directory in /home/jramos/public_html/libraries/fof/include.php on line 24

Fatal error: require_once() [function.require]: Failed opening required '__DIR__/autoloader/fof.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/jramos/public_html/libraries/fof/include.php on line 24

I should do to solve this problem.

thanks