Comentarios sin revisar del artículo: Primer script PEAR

Hola Miguel segui todas las instruciones al pie del texto... y al final me sale ese error...

Warning: require_once(Entities.php) [function.require-once]: failed to open stream: No such file or directory in C:wampwwwcfrasindex.php on line 8

Fatal error: require_once() [function.require]: Failed opening required 'Entities.php' (include_path='.;C:php5pear') in C:wampwwwcfrasindex.php on line 8