Why do events not show up in Historical Data Viewer

[SCADADog]

I am using Lookout V6.6 and Events are not showing up when I look at the A&E view in the Historical Data Viewer.  I ensured that I have the Events enabled in the view filter.  All Alarms show up but no events.

[ozy.ba]

Same issue here with Lookout 6.1 on Server 2008 R2.

Historical data viewer does not show list of alarms and events. 

The fact is that everything worked well and suddenly this functionality was lost.

Any suggestion is highly appreciated.