YUI PieChart does not display legend, why?

Question

HI, all.

I'm using YUI 2.5 for a project and trying to display a PieChart for some results. The problem is when I apply the style: attribute to the PieChart constructor for adding a legend, the PieChart won't show up anymore. I can see that there's a flash component on the page (by rightclicking) but no chart displayed at all, any reason why?

  var myChart = new YAHOO.widget.PieChart("chartresults", ds, {
        style:
        {
            legend:
            {
                display: "right"
            }
        },
        dataField: "Number of Records",
        categoryField: "Artist",
        series: [{}]
    });

The source is a local HTML table. If I delete the style { } block, the chart will display fine, but without a legend of course.

Thanks!