Remote - Active Directory issues

Dear All,

can any one suggest me the KB to re configure the remote - active directory authentication, i have added the my local active directory with following info: port :389, directory tree= CN=f5,OU=Groups,DC=katapa,DC=com scope=sub bind=DN:f5@katapa.com login LDAPattrib-sAMAccountName.

but not able to login with AD user of that group.

any advice here! regards,