spamassassin almost does not detect spam

Hi.

PRODUCT, VERSION, VERSION OF MICROUPDATE, OPERATING SYSTEM, ARCHITECTURE

Microsoft Windows Server 2008 R2 Service Pack 1
Versión del panel 11.0.9 Actualizar #64
MailEnable 7.06


PROBLEM DESCRIPTION
Plesk panel does not update the pickup event section at the mta config in mailenable.
Spamassassin do not detect spam mails or only a few of then.

STEPS TO REPRODUCE
I put 3 dns blacklist servers at the mail config section.
I check the "check incoming mail" option and the "Activate...

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