Marcone,
Did you get any further on this one?
I'm having the exact same problem - not being able to access the inner (nested) frames...
When I run:
$oFrameMain = _IEFrameGetObjByName ($oIE, "mainframe")
$oFrameH = _IEFrameGetObjByName ($oFrameMain, "Hauptframe")
$oFrameL = _IEFrameGetObjByName ($oFrameMain, "Leftframe")
It comes back with this error (in SciTe):
C:\Program Files\AutoIt3\Include\IE.au3 (747) : ==> The requested action with this object has failed.:
$oTemp = $o_object.document.parentWindow
$oTemp = $o_object.document^ ERROR
Same codebase as Marcone.
Grtz,
Rick