Map comparison fails in the executable model

    @Test
    public void testBetaMap() {

        String str =
                "import " + Result.class.getCanonicalName() + ";" +
                "import " + Map.class.getCanonicalName() + ";" +
                "rule R when\n" +
                "  $r : Result()\n" +
                "  $markV : Map(this['name'] == 'Mark')\n" +
                "  $olderV : Map(this['name'] != 'Mark', this['age'] > $markV['age'])\n" +
                "then\n" +
                "  $r.setValue($olderV.get(\"name\") + \" is older than \" + $markV.get(\"name\"));\n" +
                "end";

        KieSession ksession = getKieSession( str );

        Result result = new Result();
        ksession.insert( result );


        Map mark = mapPerson("Mark", 37);
        Map edson = mapPerson("Edson", 35);
        Map mario = mapPerson("Mario", 40);

        FactHandle markFH = ksession.insert(mark);
        FactHandle edsonFH = ksession.insert(edson);
        FactHandle marioFH = ksession.insert(mario);

        ksession.fireAllRules();
        assertEquals("Mario is older than Mark", result.getValue());

        result.setValue( null );
        ksession.delete( marioFH );
        ksession.fireAllRules();
        assertNull(result.getValue());

        mark.put("age", 34 );
//        ksession.update( markFH, mark, "age" );

    }