If you try to record the locator of the IE notification/download bar, Silk Test does not appear to recognise it (no green box shows around the bar or the buttons inside it). If Microsoft Accessibility is turned on, you may or may not be able to record an action against the bar.
This is a known problem with IE 9 onwards. The root of the problem is that the bar is owner-drawn, so Silk Test cannot see the bar even using the Win32 techdomain. However, if you record the locators and then expand the locator tree until the control is exposed, the control will validate correctly.
The most stable way of ensuring that the testcase plays back is to use scripting for the testcase, ensure Microsoft Accessibility is turned on and then manually code the buttons as follows:
e.g. (in Silk Test Workbench)
With _desktop.BrowserApplication("WebBrowser")
.SetActive
.AccessibleControl("Save").Click(MouseButton.Left, New Point(5,5))
End With
Note that not all of the buttons on the bar are AccessibleControls - some are standard PushButtons (e.g. 'Cancel').