--quarentine

I installed the qmail-scanner with the option --quarentine 1 and it works
for almost all SPAM, but some go by him same presenting the status:  
  
X-Spam-status: Yes, score=5.9 required=5.0  
X-Spam-Level: +++++  
Received: from server.webcountry.net (HELO host37.webcountry.net)
(216.65.111.2)  
  
Why does that happen? Should not he catch that message and to play in /
var/spool/qscan/quarentine/spam/new?  
  
Thanks,
  

Fernando Crelick