C # created an Excel graph - it must be a ScatterLine, but this is a line type on other computers

Question

I have a problem with an Excel type graph appearing as a ScatterLine. Oddly enough, after compiling on my computer it looks like a ScatterLine, but for everyone else it looks like a line type that does not have an X axis.

private void showExcelXY_Open(ArrayList al) { ArrayList alX = new ArrayList(); ArrayList alY = new ArrayList(); alX.Clear(); alY.Clear(); for (int i = 0; i < al.Count; i++) { string[] val = al[i].ToString().Split('^'); alX.Add(val[0]); alY.Add(val[1]); } xla = new Microsoft.Office.Interop.Excel.Application(); xla.Visible = true; Workbook wb = xla.Workbooks.Add(XlSheetType.xlWorksheet); Worksheet ws = (Worksheet)xla.ActiveSheet; // Now create the chart. ChartObjects chartObjs = (ChartObjects)ws.ChartObjects(Type.Missing); ChartObject chartObj = chartObjs.Add(100, 20, 500, 300); Microsoft.Office.Interop.Excel.Chart xlChart = chartObj.Chart; //add some data from your datasource like a dataset or like below. ws.Cells[1, 1] = "Pressure"; ws.Cells[1, 2] = "Compression"; ws.Cells[2, 1] = alX[0]; ws.Cells[2, 2] = alY[0]; ws.Cells[3, 1] = alX[1]; ws.Cells[3, 2] = alY[1]; ws.Cells[4, 1] = alX[2]; ws.Cells[4, 2] = alY[2]; ws.Cells[5, 1] = alX[3]; ws.Cells[5, 2] = alY[3]; ws.Cells[6, 1] = alX[4]; ws.Cells[6, 2] = alY[4]; ws.Cells[7, 1] = alX[5]; ws.Cells[7, 2] = alY[5]; ws.Cells[8, 1] = alX[6]; ws.Cells[8, 2] = alY[6]; //set the source data and the chart type. Range chartRange = ws.get_Range("A2", "B8"); xlChart.SetSourceData(chartRange, Type.Missing); xlChart.ChartType = XlChartType.xlXYScatterLines; // Customize axes: Microsoft.Office.Interop.Excel.Axis xAxis = (Microsoft.Office.Interop.Excel.Axis)xlChart.Axes(XlAxisType.xlCategory, XlAxisGroup.xlPrimary); xAxis.HasMajorGridlines = true; xAxis.HasTitle = true; xAxis.AxisTitle.Text = "Above Pressure (psi) Below"; Microsoft.Office.Interop.Excel.Axis yAxis = (Microsoft.Office.Interop.Excel.Axis)xlChart.Axes(XlAxisType.xlValue, XlAxisGroup.xlPrimary); yAxis.MajorTickMark = XlTickMark.xlTickMarkCross; yAxis.HasTitle = true; yAxis.AxisTitle.Text = "Compression (lbf)"; // Add title: xlChart.HasTitle = true; xlChart.ChartTitle.Text = "XPak Performance Envelope" + '\n' + "(Open Top & Bottom)"; // Remove legend: xlChart.HasLegend = false; } 

The code clearly shows that it sets the type of chart as:

 xlChart.ChartType = XlChartType.xlXYScatterLines; 

Any ideas would be greatly appreciated!