Zone Alarm Internet Security Suite version 9.0.083.000

The Advanced Options button of the Anti-Virus/Anti-Spyware tab allow me to set the database update frequency to 3 Hrs, 6 Hrs, 12 Hrs or 24 Hrs.

I have selected 24 Hrs, but the database is still updated every 3 Hrs. Does anyone know why this happens or how I can fix it?

The same thing happened with version 8.0.400.020.