Com error in _IEAttach with embedded IE

[Nine]

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <IE.au3>

$oIE = _IECreateEmbedded ()
GUICreate("Embedded Web control Test", 640, 580)
GUICtrlCreateObj($oIE, 10, 40, 600, 360)
GUISetState()
_IENavigate ($oIE, "http://www.autoitscript.com")
$oIEatt = _IEAttach ("Embedded","embedded")
MsgBox ($MB_SYSTEMMODAL,"",IsObj ($oIEatt))
$oObj = _IETagNameGetCollection ($oIEatt, "li")
MsgBox ($MB_SYSTEMMODAL,"",$oObj.length)

While 1
	Switch GUIGetMsg()
		Case $GUI_EVENT_CLOSE
			ExitLoop
	EndSwitch
WEnd

Ends up with a COM error :

"C:\Program Files (x86)\AutoIt3\Include\IE.au3" (3066) : ==> The requested action with this object has failed.:
Return $oIE.Document.parentwindow
Return $oIE.Document ^ERROR

But if you remove .Document.parentwindow from the Func IEControlGetObjFromHWND () it works fine...