OWC画多条折线 纵坐标数据有问题

Question

ChartSpace laySpace = new ChartSpaceClass();
  ChChart InsertChart = laySpace.Charts.Add(0);
InsertChart.Type = ChartChartTypeEnum.chChartTypeLineStackedMarkers;ChartChartTypeEnum.chChartTypeScatterSmoothLineMarkers;
        InsertChart.HasLegend = false;
        InsertChart.HasTitle = true;
        InsertChart.Title.Caption = GraphCaption;                InsertChart.Axes[0].HasTitle = true;
        InsertChart.Axes[0].Title.Caption = yTitle;
        InsertChart.Axes[0].HasMajorGridlines = true;
        InsertChart.Axes[0].HasMinorGridlines = true; InsertChart.PlotArea.Interior.Color = "white";        InsertChart.SeriesCollection.Add(0);
        InsertChart.SeriesCollection[0].Line.DashStyle = ChartLineDashStyleEnum.chLineSquareDot;
        InsertChart.SeriesCollection[0].Marker.Size = 5;
        InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimSeriesNames, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strSeriesName);
        InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimCategories, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strXdata);
        InsertChart.SeriesCollection[0].SetData(ChartDimensionsEnum.chDimValues, (int)ChartSpecialDataSourcesEnum.chDataLiteral, 值1序列);
        InsertChart.SeriesCollection.Add(1);
        InsertChart.SeriesCollection[1].Line.DashStyle = ChartLineDashStyleEnum.chLineSquareDot;
        InsertChart.SeriesCollection[1].Marker.Size = 5;
        InsertChart.SeriesCollection[1].SetData(ChartDimensionsEnum.chDimSeriesNames, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strSeriesName);
        InsertChart.SeriesCollection[1].SetData(ChartDimensionsEnum.chDimCategories, +(int)ChartSpecialDataSourcesEnum.chDataLiteral, strXdata);
        InsertChart.SeriesCollection[1].SetData(ChartDimensionsEnum.chDimValues, (int)ChartSpecialDataSourcesEnum.chDataLiteral, 值2序列);两条折线是都生成出来了.
可总是其中一条折线点的纵坐标和真实数据对应不上．
试了好长时间都没解决．求救