[Zope] Problem SESSION with Zope 2.7.3b1-0

I have problem using Session with Zope 2.7.3b1-0. I define one set in Session and when I execute one get the Session object not response. Someone was have this problem? I applied package iHotfix 0.4 and don`t was obtain success. Regards, -- Andre Amram Duque Analista de Sistemas Senior VARIG Brazilian Airlines - RIONS GGTI - Gerencia Geral de Tecnologia da Informacao Tel.: + 55-0XX-21-3814-5920 Fax:: + 55-0XX-21-3814-5796 e-mail: andre.duque@varig.com