WDF (DFW?) Example and Power Management

In prep for WinHEC 2004, I've been looking at the Windows Driver Framework
(WDF or DFW?) Example from WinHEC 2003 DDK disk. I've compiled and
installed the src\dfw\Example sample and found a little problem.

When I go into Standby mode, DrvDeviceCanSuspend (i.e. the
EvtDeviceCanSuspend FdoCallback event) gets called twice. However,
DrvDeviceSetPowerState (i.e. the EvtDeviceSetPowerState FdoCallback) is
never called.

When I come out of Standby, then DrvDeviceSetPowerState is called. This is
OK.

Shouldn't DrvDeviceSetPowerState also be called when going into Standby so
that I can power down the hardware I am controlling?

((&-<