Running test cases on pydev raises an exception due to a problem in the standard library

Hi all, I have a django app that works correctly from the console, but
if I try to pass the tests cases from Eclipse+PyDev I got the
following exception:

Traceback (most recent call last):
File "C:\Users\gfuentes\workspace\AG\src\cfx\manage.py", line 19, in
<module>
execute_manager(settings)
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\core\management\__init__.py", line 438, in
execute_manager
utility.execute()
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\core\management\__init__.py", line 379, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\core\management\base.py", line 191, in run_from_argv
self.execute(*args, **options.__dict__)
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\core\management\base.py", line 220, in execute
output = self.handle(*args, **options)
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\core\management\commands\test.py", line 19, in handle
from django.test.utils import get_runner
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\test\__init__.py", line 6, in <module>
from django.test.testcases import TestCase, TransactionTestCase,
skipIfDBFeature, skipUnlessDBFeature
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\test\testcases.py", line 14, in <module>
from django.test import _doctest as doctest
File "c:\users\gfuentes\workspace\ag\lib\site-packages\django-1.3-
py2.5.egg\django\test\_doctest.py", line 104, in <module>
import unittest, difflib, pdb, tempfile
File "C:\sw\Python25\lib\pdb.py", line 53, in <module>
class Pdb(bdb.Bdb, cmd.Cmd):
AttributeError: 'module' object has no attribute 'Cmd'

The django version is: 1.3
Python version: 2.5

I already checked on the Internet but without success. When I run it
from the console I use the same python installation

Do you have any ideas?
Thank you from advanced

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