Vista won't start screen saver

[PTravel]

Before the log-in screen, Vista will call up the screen saver after the
appropriate delay. Once logged-in and on the desktop, however, it doesn't.
Screen saver settings are correct.

Any idea what's happening? I've got a nice screen saver I'd like to use,
but it will only start manually.

 

[cqui3]

When that happens on my compter, I reset the screensaver activation to a
minue
lower or higher and save the settings.I then shutdown the computer and
restart.
I always works.