When VBS is supposed to exit from Idle mode?

Dec 2, 2008 at 1:10 AM
When I leave my laptop inactive for awhile, VBS switches it to the power schema which is specified in Idle VBS settings.
However, when I start using it again, it does not switch it back to the "Plugged in" schema settings.
Is it how it is supposed to be?
Also, is there any way to make it NOT to change the current power schema when it is in Idle?

- Thanks in advance,