No activity recorded since Jan 27th

There has bee no activity recorded for my children since 27th of January.  I have checked and safety minder is running and appears to be working but I have had no warning email and there is no entries in the activity log after the 27th even though my children have been using the computer.  Even when i deliberately try and access a blocked site from my childs account, the site is blocked but no email is generated and no event logged.

 

Windows 7 ultimate

Safety Minder 1.2.0.39

Framework 1.2.0.53

Data Store 1.2.0.53