[resolved] Dynamic controls disappear on click

[MrGTI]

This is probably a simple solution, but i can't figure it out......

I dynamically create a control on the page, but it disappears when a button on the page is clicked. Here's an example of what i have:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'If Me.IsPostBack = True Then Exit Sub
    End Sub
 
    Private Sub btnOne_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOne.Click
        Dim chkSample As New CheckBox
        With chkSample
            .Text = "I was added in the code"
            .ID = "chkSample"
            .EnableViewState = True
        End With
 
        pnlSample.Controls.Clear()
        pnlSample.Controls.Add(chkSample)
        pnlSample.EnableViewState = True
 
        lblTalk.Text = "button ONE was clicked"
    End Sub
 
    Private Sub btnTwo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTwo.Click
        lblTalk.Text = "button TWO was clicked"
    End Sub

I thought that the controls and their state were supposed to remain, but they don't. Run the page and click the first button - the code runs and creates the checkbox. Then click the second button - the checkbox vanishes.

What am i doing wrong?