Warning: require_once(propel/om/Persistent.php): failed to open stream: No such file or directory in D:\Apache2.2\htdocs\safexchange\gulliver\thirdparty\propel\om\BaseObject.php on line 23

Fatal error: require_once(): Failed opening required 'propel/om/Persistent.php' (include_path='.;C:\php\pear') in D:\Apache2.2\htdocs\safexchange\gulliver\thirdparty\propel\om\BaseObject.php on line 23