Datagridview columnheader image disappears on mouse hover

Hi,
I have added a image in datagridview columnheader on cell painting event

    Private Sub Dg1_CellPainting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellPaintingEventArgs) Handles Dg1.CellPainting

        AddTickToSelectionCol(sender, e) 'Add a tick image on the first column of grid
    End Sub

Public Sub AddTickToSelectionCol(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellPaintingEventArgs)
        If e.ColumnIndex = 0 AndAlso e.RowIndex = 0 Then
            e.PaintBackground(e.ClipBounds, False)

            Dim pt As Point = e.CellBounds.Location
            Dim offset As Integer = (e.CellBounds.Width - Me.ImageList1.ImageSize.Width) / 2

            pt.X += offset
            pt.Y = 1
            Me.ImageList1.Draw(e.Graphics, pt, 0)

            e.Handled = True

        End If
    End Sub

The problem is that it disappears on mousehover on the column header.
Any suggestions?