[Open Babel] pybel installation problem in Windows XP

[Paul B. <drb...@gm...>]

Hi,
I am having a problem installing pybel in Windows XP.  I am using 
Windows XP SP3, have Python 2.7.1 installed on C:\, OpenBabel-2.3.0 
installed on C:\ and installed the bindings via 
openbabel-python-1.6.py27.exe.  The OpenBabel GUI works fine, 
BABEL_DATADIR is set to C:\OpenBabel-2.3.0\data and I can run through 
the first two installation tests, babel -V and babel -Hsdf from Idle or 
the command line with the expected results; but when I try the third test:

>>>  import pybel
>>>  mol = pybel.readstring("smi", "CC(=O)Br")
>>>  mol.make3D()
>>>  print(mol.write("sdf"))

I don't get the expected sdf description, I get

Traceback (most recent call last):
   File "<pyshell#2>", line 1, in<module>
     mol = pybel.readstring("smi", "CC(=O)Br")
   File "C:\Python27\lib\site-packages\pybel.py", line 119, in readstring
     raise ValueError("%s is not a recognised OpenBabel format" % format)
ValueError: smi is not a recognised OpenBabel format

Any help fixing the installation would be most appreciated.

Paul