NIS 2010 Antispam Not Doing Anything?

Hello, the new Antispam engine in NIS 2010 does not seem to be doing anything at all for me.I use MS Outlook 2003.

 

Specifically, I have one address that I blocked as spam. It shows up in my actual blocked list as well when I look in the NIS 2010 Antispam configuration page. 

 

However, every day a junk mail from that address still arrives in my inbox, and I have to click "This is Spam" all over again and this moves the mail to the Junk Mail folder.

 

Any idea why this is not happening automatically considering the address in question is in my blocked list?