AfterUpdate/BeforeUpdate and SetFocus

I have some problems with the SetFocus command in a Userform with an AfterUpdate or BeforeUpdate routine.

To make it clear to you, I made a very small Userform to demonstrate it. It only contains 8 TextBoxes and this code:

Private Sub TextBox01_AfterUpdate()
Me.TextBox08.SetFocus
End Sub
-
Private Sub TextBox02_BeforeUpdate(ByVal Cancel As MSForms.ReturnBoolean)
TextBox08.SetFocus
End Sub
-
Private Sub TextBox03_Exit(ByVal Cancel As MSForms.ReturnBoolean)
TextBox08.SetFocus
End Sub
-
Private Sub TextBox04_Change()
TextBox08.SetFocus
End Sub

I expected that in all cases, the focus should be set to TextBox08, but this only happens with the Change event.

Do you have any suggestions how I can set the focus to TextBox08 in an AfterUpdate or BeforeUpdate event?

I use Excel 2007

Kind regards,

Otto.