PHP Error [2]

call_user_func(MainController::ActionRedirect?productID=250) [function.call-user-func]: First argument is expected to be a valid callback (/home/pinkpant/domains/pink-pantera.ru/public_html/App/CoreEngine.php:124)

#0 /home/pinkpant/domains/pink-pantera.ru/public_html/index.php(19): CoreEngine->Run()