Why can not import scipy?

[loo yee]

I installed Python 2.2,Numeric 22.0, Numarray 0.4, wyPython 2.3.4.2u
and my OS is WinXP, scipy version is 0.2.0_alpha_152.4463

But when I import scipy in PythonWin 2.2.1,there is an error

>>> import gui_thread
>>> <wxPython imported>
>>> from scipy import *
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\PYTHON22\Lib\site-packages\scipy\__init__.py", line 49, in ?
    import special, io, linalg, stats, fftpack
  File "C:\PYTHON22\Lib\site-packages\scipy\stats\__init__.py", line 195, in
?
    from stats import *
  File "C:\PYTHON22\Lib\site-packages\scipy\stats\stats.py", line 1500, in ?
    import distributions
  File "C:\PYTHON22\Lib\site-packages\scipy\stats\distributions.py", line
18, in ?
    from scipy_base import atleast_1d, polyval, angle, ceil, insert,
extract, \
ImportError: cannot import name insert
>>>

and when i import scipy in IDLE,there is another error:
>>> import gui_thread
>>> from scipy import *
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in ?
    from scipy import *
  File "C:\PYTHON22\Lib\site-packages\scipy\__init__.py", line 49, in ?
    import special, io, linalg, stats, fftpack
  File "C:\PYTHON22\Lib\site-packages\scipy\linalg\__init__.py", line 42, in
?
    from basic import *
  File "C:\PYTHON22\Lib\site-packages\scipy\linalg\basic.py", line 11, in ?
    from lapack import get_lapack_funcs
  File "C:\PYTHON22\Lib\site-packages\scipy\linalg\lapack.py", line 9, in ?
    from scipy_distutils.misc_util import PostponedException
ImportError: cannot import name PostponedException
>>>

What can i do?

Regards,

LuYi