Cannot add more than one line in a chart

I populate a Dataset whith multiple data tables of results, and then I loop through each of the tables to reveal my results.

However only the first datatable is used the others are ignored.

I have made sure that the lineseries name is the same as the datatable ?

Any ideas please ??

foreach (DataTable table in myRunData.Tables)
            {
              
                LineSeries currentLine = new LineSeries();
                lineSeries1.Name = table.TableName;
                lineSeries1.LabelsAppearance.Visible = true;
                lineSeries1.LabelsAppearance.DataFormatString = "y";

                lineSeries1.TooltipsAppearance.Color = System.Drawing.Color.Blue;
                lineSeries1.TooltipsAppearance.DataFormatString = "{0}";

                lineSeries1.DataFieldY = "TimeInSeconds";

                lineSeries1.TooltipsAppearance.ClientTemplate = " #= kendo.parseInt(value/60) #:#= (value%60) # minutes";
                lineSeries1.LabelsAppearance.ClientTemplate = " #= kendo.parseInt(value/60) #:#= (value%60) # minutes";

                lineSeries1.TooltipsAppearance.DataFormatString = "{0:hh:MM:ss}";
                RadHtmlChart1.PlotArea.Series.Add(lineSeries1);
            }
            RadHtmlChart1.DataSource = parkRunData;
            RadHtmlChart1.DataBind();
            if (!RadHtmlChart1.Visible)
            {
                RadHtmlChart1.Visible = true;
            }