change cookie path

edit

askbot set the cookie path as ''/", So when I change the path in settings.py using SESSION_COOKIE_PATH="/index"and askbot can not work when i login. I want to develop 2 askbot in different port like this: http://www.example.com:8000 ----this is the math askbot http://www.example.com:8080 ----this is the tex askbot if their cookies can not separate in two different path , one login cookie will be covered by another, so how can I change that. thanks a lot.