I'm doing some simple evaluation of jrules and I ran into a problem.  Here's the rule I'm having problems with:
 
rule "751845 - Check Stages"

    when

        order : Order( stages excludes 921 )

    then

        System.out.println( "This order contains " + order.getStages() );

end

OUTPUT:

This order contains [804, 921]

I'm actually trying to do the opposite using 'stages contains 921'.  stages is defined as follows in the Order object.

private ArrayList<Integer> stages;

I'm using the 3.0.6 binaries on W2K w/Eclipse.

Any ideas what I'm doing wrong here?