hybernation problem in W2k

Here's the problem.
When my WDM driver is called to initialize the hardware due to a
IRP_MN_SET_POWER indicating power has been increased (I set the target
machine to hybernate mode), the memory map of the device I/O doesn't
look right. All registers read contain 0XFFFFFFFF. This is not
correct. When I test Standby mode, it work just find. One of the tasks
I need to perform when waking up from a hybernation is to reload the
device firmware.

Do I need to remap the I/O memory space. At one time, I thought this
was working.

John