Sorry, I'm not sure what you mean by disabled.
First, I want to confirm that your license is recognized and installed. you should see the expiration date here:
Configuration > Update > ScreenOS/Keys
License Box:
Url Filtering: Expire Date: 20xx/MM/DD
If the date is current, then also confirm that your NTP is setup and working. the current system Date/Time is on the top of the screen and the NTP is set here.
Configuration > Date/Time