Regarding DFU_Get_status

Hi,
I am working on DFU driver.I have got the DFU descriptors exposed by my
device.Now my device is in DFU mode.Now when I issue a Get_status
command.I see the following messages


ETHUSB - To WORKING from STOPPED
ETHUSB - PNP Request (IRP_MN_QUERY_CAPABILITIES)
ETHUSB - PNP Request (IRP_MN_QUERY_PNP_DEVICE_STATE)
ETHUSB - PNP Request (IRP_MN_QUERY_DEVICE_RELATIONS)
ETHUSB DispatchControl
ETHUSB - Code 222030
ETHUSB Calling Get_DFU_STATUS
ETHUSB - Inside Get_DFU_STATUS
ETHUSB - Inside SendDFUCommand
ETHUSB - DFU_Request 3
ETHUSB - Timeout milliseconds 0
ETHUSB - DFU Interface 0
ETHUSB - Data send or received 0
ETHUSB - Total length of data 6
ETHUSB - IoBuildDeviceIoControlRequest FFFFFFFF
ETHUSB - IRP Pointer 8592CAB0
ETHUSB - After IoCallDriver 103
ETHUSB - Before Assigning status 0
ETHUSB - IoBuildDeviceIoControlRequest C000009D
ETHUSB - IoBuildDeviceIoControlRequest C000009D
ETHUSB - Error : DFUGetstatus C000009D
ETHUSB - IRP_MJ_CLEANUP
ETHUSB-status :0
ETHUSB - IRP_MJ_CLOSE
ETHUSB - No queue elements for freeing.
ETHUSB - PNP Request (IRP_MN_REMOVE_DEVICE)
ETHUSB - To REMOVED from SURPRISEREMOVED



It shows that the STATUS_DEVICE_NOT_CONNECTED.I am not sure why it is
coming.I have checked few utilities like uvc viewer which shows that
the device is connected.I also see the debug prints above which shows
that device is connected.then why is it showing that c000009D error.


I also have another doubt,is there a way to read the functional
descriptors iof the device.there are commands to read device descriptor
and config descriptor,but how can I read the functional descriptor.
pls do reply.
thanks in advance