[Solved] Label position "OutsideEnd" does not work

[Andy]

When I change the "labels" position:"Center", it works fine. But when I use "OutsideEnd", it still behavior like
"InsideEnd" Am I missing anything here?

function onBarChartDataBound(e) {
                   this.options.series = [];
                   $.each(this.dataSource._data, function(){
                       getBarChart().options.series.push({ data: [this.Volume],
                                                           name: this.ProductName,
                                                          color: this.Color,
                                                           type: "column",
                                                            gap: 0.5,
                                                        spacing: 0,
                                                        labels: { color: "white", position: "OutsideEnd", visible: true }
                                                    });
                   })
               }