Time Controls Not Working - Norton Online Family For Kindle Fire

I'm running the free version for Norton Family on a Kindle Fire, (latest version of OS). The time controls are not working. My daughter is still able to use the device and surf passed the allowed times. Please advise.

I'm running the free version for Norton Family on a Kindle Fire, (latest version of OS). The time controls are not working. My daughter is still able to use the device and surf passed the allowed times. Please advise.