BESR 2010 Events Not Triggered

Hi

I am running Backup Exec System Recovery 2010 using files and folder option,
when i try to set the event trigger "any user logs on to the computer".

The event is not triggered upon logging out and logging on to the computer.

Is there anything that i should take note so that the event will be triggered?
How long does it take for the backup to start upon the happening of an event?
If a daily backup has been done, does the event trigger another backup??

Thanks for the answer in advance.