Rate limiting of network command not work

Hi, i just install LookingGlass v1.3.0. I want to apply rate limiting of network command, but im not success. All features is running successfully, and there is no error in apache log.
When i try to check ratelimit.db using sqlite, i can't see any record that has been inserted. So i think that is the reason of rate limit is not work. Please help to resolve it. Thank you in advance