Cita: Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at c:\wamp\www\WEB\carrito_php\ver_carrito.php:2) in c:\wamp\www\WEB\autentificator\aut_verifica.inc.ph p on line 150
¿Llamas a session_start() en la linea 150 de tu script?