通过unixODBC和FreeTDS从MSSQL返回Cyrillic符号的问题

I'm using django-pyodbc as database backend on Ubuntu 12.04 LTS and MSSQL 2008 on remote host. It works good except of returning Cyrillic symbols. Instead of them I see question marks - '?'. I have begin investigation what could cause this problem.I'm using django-pyodbc as database backend on