Below code works for me under VS 2008,
try it, probably might also work for you !

Code:
Private Sub PanelRemark_Scroll(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles PanelRemark.Scroll
        If e.ScrollOrientation = ScrollOrientation.VerticalScroll Then
            PanelRemark.AutoScrollPosition = New Point(PanelRemark.AutoScrollPosition.X, _
...