I can't reconfigure anymore

[Vincent van Ravesteijn]

Traceback (most recent call last):
 File "C:/Users/Vincent/OpenSource/LyX/svn-trunk/lib/configure.py", 
line 11, in
<module>
   import sys, os, re, shutil, glob, logging
ImportError: No module named logging
WinVista
Python 2.6

Vincent