How to make your ATX machine automatically shutting down on windows XP

For some ATX machine, it may cannot automatically shutting down on WIndows XP. How to fix this ?

(1) Go to the Control Panel
(2) Go to the Power Options (on some Windows XP version it may Performance and Maintenance)
(3) Click on the ATM tab
(4) Enable Advanced Power Management Support checkbox.
(5) Shutting down your machine to test the effect.