[RESOLVED] Plotting a line chart problem (In user control)

[pourkascheff]

Hi all.
This is an example code which works properly and plots an xy series of dots/lines.

Public Class Form2
    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
        Label1.Text = Val(Label1.Text) + 1
        Chart1.Series(0).Points.AddXY(Val(Label1.Text), TrackBar1.Value)
    End Sub
End Class

Here's the results safe and easy:


However, to show a line chart in a usercontrol same code (In a try catch) will cause following exception:
"Index was out of range. Must be non-negative and less than size of collection. Parameter name: index" Series1 is OK in term of name, checked.
"A chart element with the name 'Series1' could not be found in the 'SeriesCollection'." Integer id same as example code.

* Both way were tried. Nothing achieved.
Any clues? Is there another way/method to add point in x and y?