hashlib import error on digi transport wr44(firmware 5099)

I’m trying to use md5 hash function. When importing the md5 module in python command line, i’m getting the following result :

>>> import md5
__main__:1: DeprecationWarning: the md5 module is deprecated; use hashlib instea
d
Traceback (most recent call last):
  File "", line 1, in 
  File "../../lib\md5.py", line 10, in 
  File "../../lib\hashlib.py", line 136, in 
  File "../../lib\hashlib.py", line 63, in __get_builtin_constructor
ImportError: No module named _md5

So, i’ve tryed to import the hashlib module :

>>> import hashlib
Traceback (most recent call last):
  File "", line 1, in 
  File "../../lib\hashlib.py", line 136, in 
  File "../../lib\hashlib.py", line 63, in __get_builtin_constructor
ImportError: No module named _md5

The digi transport seems to run python 2.6 :

ss140844>Python 2.6.1 (r261:67515, Apr 16 2010, 17:34:27) [C] on digiSarOS
Type "help", "copyright", "credits" or "license" for more information.

Thanks for any help…