Scheduled Tasks settings fails when hibernated to "Wake the computer to run this task"

In "Start > Programs > Accessories > System Tools > Scheduled Tasks" I have a task ("BitDefender"), set to start daily at 03:01, that in the bottom of its "Settings" tab, has the "Wake the computer to run this task" checked.

(BD's internal scheduler can't wake properly; BD when contacted replies this will be fixed later)

The computer is a laptop, Uniwill 223ei0, BIOS AMI 223, XP Pro SP2 b2600; in "Start > Settings > CP > Power Options > Advanced > Power buttons" it is set so that pressing power button or closing lid makes the PC hinernate, and pressing sleep button makes it Stand By.

When the PC is in Stand By, it duely wakes at 03:01. But when it is hibernated, it doesn't start.

Anyone knows how I could make Windows work as announced on this? TIA,

Versailles, Mon 10 Sep 2007 13:00:00 +0200