install pyOpenSSL in python2.7

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i have install pyOpenSSL-0.11 in python2.7 this way:
download pyOpenSSL-0.11.tar.gz
#tar -zvxf pyOpenSSL-0.11.tar.gz
#cd pyOpenSSL-0.11
#python setup.py install

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/OpenSSL/__init__.py", line 45, in <module>
from OpenSSL import rand, SSL
ImportError: /usr/local/lib/python2.7/dist-packages/OpenSSL/SSL.so: undefined symbol: SSLv2_method


how can i fix the problem?
ImportError: /usr/local/lib/python2.7/dist-packages/OpenSSL/SSL.so: undefined symbol: SSLv2_method