User-defined spam option not present in NIS2012?

I have just upgraded from NIS 2011 to 2012 and  I find that when I right-click on an Email in Outlook Express I no longer have an option to classify the message as "spam" whereby NIS would re-classify the message and ask if I wanted to add the sender to my blocked list.

This was available in NIS2011, why the change.....or am I missing something here?

It's annoying because I'm getting messages from online casinos  that I would like to classify as spam.