Windows 2000 and ACPI

Hi,

How do I prevent Windows 2000 from entering STANDBY while my USB CAMERA
device is runing ? The following way seems not work.
In INF file ->
HKR,PageOutWhenUnopened,3,01
HKR,PowerDownWhenUnopened,3,01
HKR,DontSuspendIfStreamsAreRunning,3,01

Regards,
Yuan Lee


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