when i try to test my build of pyxpcom against xulrunner 1.8.0.4

i get the following, any one have any clues?

C:\dev\xulrunner1801\mozilla\obj-i586-pc-msvc\dist\bin\python> python
Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
> >> import xpcom
> >> import xpcom.components
Failed to get info for IID '{a88e5a60-205a-4bb1-94e1-2628daf51eae}'
Traceback (most recent call last):
  File "<stdin> ", line 1, in ?
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\components.py",
 line 55, in ?
    manager = xpcom.client.Component(_xpcom.GetComponentManager(),
_xpcom.IID_nsIComponentManager)
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\client\__init__.py",
 line 229, in __init__
    self.QueryInterface(iid)
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\client\__init__.py",
 line 299, in QueryInterface
    self._remember_interface_info(iid)
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\client\__init__.py",
 line 272, in _remember_interface_info
    method_infos, getters, setters, constants = BuildInterfaceInfo(iid)
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\client\__init__.py",
 line 147, in BuildInterfaceInfo
    interface = xpt.Interface(iid)
  File
"C:/dev/xulrunner1801/mozilla/obj-i586-pc-msvc/dist/bin/python\xpcom\xpt.py",
 line 83, in __init__
    item = iim.GetInfoForIID(iid)
xpcom.Exception: 0x-7fffbffb (NS_ERROR_FAILURE)

Thanks,
Michael