error on "python setup.py test"

python setup.py test
running test
...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................SelfTest: You can ignore the RandomPool_DeprecationWarning that follows.
build/lib.linux-x86_64-2.6/Crypto/Util/randpool.py:40: RandomPool_DeprecationWarning: This application uses RandomPool, which is BROKEN in older releases. See http://www.pycrypto.org/randpool-broken
  RandomPool_DeprecationWarning)
..........E...................
======================================================================
ERROR: Test that mpzToLongObj and longObjToMPZ (internal functions) roundtrip negative numbers correctly.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "build/lib.linux-x86_64-2.6/Crypto/SelfTest/Util/test_number.py", line 283, in test_negative_number_roundtrip_mpzToLongObj_longObjToMPZ
    k = number._fastmath.rsa_construct(n, e)
AttributeError: 'NoneType' object has no attribute 'rsa_construct'

----------------------------------------------------------------------
Ran 1033 tests in 92.202s

FAILED (errors=1)
Traceback (most recent call last):
  File "setup.py", line 456, in <module>
    core.setup(**kw)
  File "/usr/lib64/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/usr/lib64/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/usr/lib64/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "setup.py", line 336, in run
    SelfTest.run(module=moduleObj, verbosity=self.verbose, stream=sys.stdout, config=self.config)
  File "build/lib.linux-x86_64-2.6/Crypto/SelfTest/__init__.py", line 74, in run
    raise SelfTestError("Self-test failed", result)
Crypto.SelfTest.SelfTestError: ('Self-test failed', <unittest._TextTestResult run=1033 errors=1 failures=0>)

[root@mysql-mgmt3 pycrypto-2.6.1]# python -V
Python 2.6.6