Ironpython call numpy problem

Question

Ironpython 2.6, python 2.6.5, numpy, SciPy

import sys
sys.path.append(r'D:\Python26\dll')
sys.path.append(r'D:\Python26\Lib')
sys.path.append(r'D:\Python26\Lib\site-packages')

» import numpy
Traceback (most recent call last):
  File "", line 1, in 
  File "D:\Python26\Lib\site-packages\numpy\__init__.py", line 132, in 
  File "D:\Python26\Lib\site-packages\numpy\add_newdocs.py", line 9, in 
  File "D:\Python26\Lib\site-packages\numpy\lib\__init__.py", line 4, in 
  File "D:\Python26\Lib\site-packages\numpy\lib\type_check.py", line 8, in 
  File "D:\Python26\Lib\site-packages\numpy\core\__init__.py", line 5, in 
ImportError: No module named multiarray

What's wrong? Thanks.