dove sbaglio?

codice:
Protected WithEvents Tbl As System.Web.UI.WebControls.Table
   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Tbl.Controls.Clear()
        Dim i, j As Integer
        Dim rownew As New TableRow
        For i = 0 To 5
            Tbl.Controls.Add(rownew)
            For j = 0 To 7
                Dim cellnew As New TableCell
                cellnew.Text = "ciao"
                cellnew.BorderWidth = Unit.Pixel(1)
                rownew.Controls.Add(cellnew)
            Next

        Next
    End Sub
doverei creare 5 righe con 7 celle ciascuna
il procedimento mi sembra giusto booooooooooo
ringrazio tutti