UserForm Textbox.visible tab order doesn't work

[03856me]

I have a userform with textboxes/labels that are hidden unless certain choices are made in a combobox. The code is working as expected with one exception: The exit event triggers the correct boxes to become visible and clears and hides the right ones - in the tab order they are directly after the combo box - but the focus is not on the now visible one. I have the code in an exit event, I also tried AfterUpdate event but it works the same way. This code basically ignores the tab order. What am I missing?

Private Sub cbo_machctr_Exit(ByVal Cancel As MSForms.ReturnBoolean)
    cbo_machctr.BackColor = &HFFFFFF
    If cbo_machctr.Value = "Boiler" Then
        Me.lbl_function.Visible = True
        Me.cbo_boilerfunction.Visible = True
        Me.cbo_kilnfunction.Value = ""
        Me.cbo_kilnfunction.Visible = False
    Else
        If cbo_machctr.Value = "Kiln" Then
            Me.lbl_function.Visible = True
            Me.cbo_kilnfunction.Visible = True
            Me.cbo_boilerfunction.Value = ""
            Me.cbo_boilerfunction.Visible = False
        Else
            Me.lbl_function.Visible = False
            Me.cbo_boilerfunction.Visible = False
            Me.cbo_kilnfunction.Visible = False
        End If
    End If
End Sub

 

[03856me]

Bump - really need some help if someone can point me in the right direction please