handler of dynamically added linkbutton is not getting called

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VB

ASP.NET

Hello All,

In my Project i am creating some linkbuttons dynamically when i iterate through my DB table. I am creating the buttons and adding event handler as follows

'Iterating through the Table
If (ds.Tables(0).Rows.Count > 0) Then
                'Reading row by row from DB
                Dim ros As Int32 = ds.Tables(0).Rows.Count - 1
                Do While ros >= 0

                    Dim tr As TableRow = New TableRow()
                    Dim tc As TableCell = New TableCell()
                    Dim btnUser As LinkButton = New LinkButton()
                    AddHandler btnUser.Click, AddressOf btnUser_Click
                    btnUser.ID = (ds.Tables(0).Rows(ros)("UserName")).ToString
                    tc.Controls.Add(btnUser)
                    tr.Cells.Add(tc)
                    tbl.Rows.Add(tr)

                    ros = ros - 1
                Loop
End If

The event handler i have given is as follows

Private Sub btnUser_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
       'setting the session value
       Dim btn As LinkButton = sender
       Dim newsId As String = btn.ID.ToString
       Session("SearchedUserName") = newsId

   End Sub

But while clicking on the linkbutton at runtime,the handler function is not getting called. I am not able to understand where i made mistake. Anybody help me in this please.