面积图不起作用

Question

这里是使用sencha touch的Sencha Fiddle中我的图表的链接，它不起作用，这里是代码

Ext.define("dashboard.view.HrsWorkedChart", {
extend: "Ext.chart.Chart",
requires: ["Ext.chart.Panel", 
           "Ext.chart.axis.Numeric", 
           "Ext.chart.axis.Category", 
           "Ext.chart.series.Area",
           "Ext.draw.engine.ImageExporter"],
alias: "widget.hrsworkedchart",
config: {
    flex: 1,
    shadow: true,
    animate: true,
    store: store1,
    cls: "chart",
    innerPadding: 20,

    legend: {
        position: {
            portrait: "right",
            landscape: "bottom"
        },
        labelFont: "20px Arial"
    },
    axes: [{
        type: "numeric",
        position: "left",
        fields: ['2003', '2004', '2005', '2006', '2007', '2008', '2009'],
        title: "Number of Hits",
        minimum: 0,
        adjustMinimumByMajorUnit: 0
    }, {
        type: "category",
        position: "bottom",
        fields: ["hrsworked"],
        title: "Month of the Year"
    }],
    series: [{
        type: "area",
        highlight: true,
        axis: "left",
        xField: "year",
        yField: ['2003', '2004', '2005', '2006', '2007', '2008', '2009']
    }],

}
});

请帮我解决这个问题