Warning: require_once(Auth/OpenID/Interface.php) [function.require-once]: failed to open stream: No such file or directory in /usr/local/Apache/htdocs/pergamum/SAML/simplesaml/modules/openid/lib/StateStore.php on line 4

Fatal error: require_once() [function.require]: Failed opening required 'Auth/OpenID/Interface.php' (include_path='.:/usr/local/lib/php') in /usr/local/Apache/htdocs/pergamum/SAML/simplesaml/modules/openid/lib/StateStore.php on line 4