Python: The _imagingft C module is not installed

I've tried lots of solution that posted on the net, they don't work.

>>> import _imaging
>>> _imaging.__file__
'C:\\python26\\lib\\site-packages\\PIL\\_imaging.pyd'
>>>

So the system can find the _imaging but still can't use truetype font

from PIL import Image, ImageDraw, ImageFilter, ImageFont


im = Image.new('RGB', (300,300), 'white')
draw = ImageDraw.Draw(im)
font = ImageFont.truetype('arial.ttf', 14)
draw.text((100,100), 'test text', font = font)

Raises this error:

ImportError: The _imagingft C module is not installed

File "D:\Python26\Lib\site-packages\PIL\ImageFont.py", line 34, in __getattr__
  raise ImportError("The _imagingft C module is not installed")