NDIS-WDM USB WLAN Miniport driver: WdfUsbTargetDeviceCreate error

> I'm porting my NDIS 5.1 based WLAN Miniport driver with WDM-USB
> lower edge on KMDF, the call's to WdfUsbTargetDeviceCreate always
> fail with status STATUS_NOT_SUPPORTED.The function
> WdfUsbTargetDeviceCreate is called from my MiniportInitialize routine.
> Please let me know what might be the possible problem. Also, below is
> snapshot of same code from my MiniportInitalize function.
>
>
> WDF_OBJECT_ATTRIBUTES attributes;
> WDFDEVICE WdfDevice;
> WDFUSBDEVICE WdfUsbTargetDevice;
> WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
>
> NdisMGetDeviceProperty(MiniportAdapterHandle,
> &Pdo,
> &Fdo,
> &NextDeviceObject,
> NULL,
> NULL);
>
>
> Status = WdfDeviceMiniportCreate(WdfGetDriver(),
> & attributes,
> Pdo,
> Fdo,
> NextDeviceObject,
> &WdfDevice);
> if (!NT_SUCCESS (Status)){...........}
>
> Status = WdfUsbTargetDeviceCreate(WdfDevice,
> WDF_NO_OBJECT_ATTRIBUTES,
> &WdfUsbTargetDevice);
> if (!NT_SUCCESS(Status)) {.............}
>
>
>
> Thanks in Advance.
>