How to Create New Bars in a BarChart Dynamically from a dataview?

Hi

this is the definition of the BarChart That I use

<ajaxToolkit:BarChart ID="ActivitiesPerfomance" runat="server" Width="100%"></ajaxToolkit:BarChart>

Then I used this code to create new bars dynamically

BarChartSqlDataSource.SelectParameters.Clear()
                BarChartSqlDataSource.SelectParameters.Add("sectionID", SectionId)
                BarChartSqlDataSource.SelectParameters.Add("sequience", sequience)
                BarChartSqlDataSource.SelectParameters.Add("intervalStart", TypeCode.DateTime, Request.QueryString("from"))
                BarChartSqlDataSource.SelectParameters.Add("intervalEnd", TypeCode.DateTime, Request.QueryString("to"))
                Dim dv2 As DataView = DirectCast(BarChartSqlDataSource.Select(DataSourceSelectArguments.Empty), DataView)

                Dim barChart As AjaxControlToolkit.BarChart = TryCast(rptrActivities.Controls(rptrActivities.Controls.Count - 1).Controls(0).FindControl("ActivitiesPerfomance"), AjaxControlToolkit.BarChart)
                For Each drv As DataRowView In dv2
                    Dim item As DataRow = drv.Row
                    Dim bars(2) As Decimal
                    bars(1) = item("target")
                    bars(2) = item("achieved")
                    barChart.Series.Add(New AjaxControlToolkit.BarChartSeries() With {
                    .Data = bars,
                    .BarColor = "red",
                    .Name = "V"
                    })

                Next

If I run it, it creates the bars with value 0 for all of them such as in this picture

https://ibb.co/pKVnmwy

The dataview contains 8 records in this case, I expected 16 Bars since I added two bars in each iteration of the (for each) loop

I noticed it adds 8 (Names) as expected, but I see no bars there

any help please?