Lumenize and Highcharts Burndown Chart

HTML

<script src="https://storage.googleapis.com/versions.lumenize.com/v0.6.8/Lumenize-min.js"></script>
<script src="http://maccherone.com/share/1000-snapshots-overlap-with-Feb-2012.json"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore.js"></script>
<div id="container" style="min-width: 400px; height: 400px; margin: 0 auto"></div>

JavaScript

chartConfig = {
        title: {
            text: 'Burndown'
        },
        xAxis: [
            categories: xAxis,
            labels :
                rotation:90
        ],
        yAxis: [{ 
            labels:
                style:
                    color: Highcharts.getOptions().colors[0]
            title:
                text: 'Accepted Points'
                style:
                    color: Highcharts.getOptions().colors[0]
            opposite: true
        }, { 
            title: {
                text: 'Task To Do (Hours)',
                style: {
                    color: Highcharts.getOptions().colors[1]
                }
            },
            labels: {
                #format: '{value} mm',
                style: {
                    color: Highcharts.getOptions().colors[1]
                }
            }

        }],
        series: [{
            name: 'Accepted',
            type: 'column',
            yAxis: 0,
            data: burnup
        }, {
            name: 'Tasks (To Do)',
            type: 'column',
            yAxis: 1,
            data: burndown
        }]
};
$("#container").highcharts(chartConfig);