ubuntu 10.04LTS ITK3.16 python bug

Hello,

trying to "import InsigthToolkit" results in the error message:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/pymodules/python2.6/InsightToolkit.py", line 1, in <module>
    from itkalgorithms import *
  File "/usr/lib/pymodules/python2.6/itkalgorithms.py", line 1, in <module>
    from itknumerics import *
  File "/usr/lib/pymodules/python2.6/itknumerics.py", line 1, in <module>
    from itkcommon import *
  File "/usr/lib/pymodules/python2.6/itkcommon.py", line 1, in <module>
    from vxlnumerics import *
  File "/usr/lib/pymodules/python2.6/vxlnumerics.py", line 4, in <module>
    from VXLNumericsPython import *
  File "/usr/lib/pymodules/python2.6/VXLNumericsPython.py", line 5, in <module>
    import _VXLNumericsPython
ImportError: No module named _VXLNumericsPython

Any idea?

Best
Andi