How te set up ldap auth

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Hello, I tried several solutions but no one helped me. I installed python-ldap module, and changed settings/LDAP_SETTINGS settings in the next way

LDAP protocol version  = version 3
LDAP URL = ldap://10.100.2.148:389
LDAP encoding = utf-8
Base DN (distinguished name) = DC=example,DC=com
User search filter template = (%s=%s)
UserID/login field = sAMAccountName
"Common Name" = blank
"Common Name" field format = First name, Last name
Given (First) name = givenName
Surname (last) name = sn
LDAP Server EMAIL field name = mail

I also added to the settings.py :
LDAP_LOGIN_DN = 'askbot'
LDAP_PASSWORD = 'My_secure_password'

But ldap authentications is not working. I tryed to find "askbot.deps.django_authopenid.backends.ldap_authenticate" function to insert a break point, but I haven't found it.

Version of askbot = 0.7.50 Can someone show correct settings for ldap?