How to change my codes for vista?

Hello

I trying to apply my File Filter Driver to Windows Vista.
However, It's not properly working now.

There are many problems.

following code, IoCallDriver return the Error code(0x8000006? 0xC00000F?)
I setup the dispatch function in DriverEntry such as,

DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
FProtModDirectoryDispatch;

and following code is FProtModDirectoryDispatch's source.

int bFileInfoValid = TRUE;
        // call lower driver and wait
        UCHAR ucFlags = IrpSp->Flags;

        IrpSp->Flags |= SL_RETURN_SINGLE_ENTRY;
        IoCopyCurrentIrpStackLocationToNext(Irp);
        IoSetCompletionRoutine(Irp, UtilSetEventCompletionRoutine, &Event, TRUE,
TRUE, TRUE);
        KeClearEvent(&Event);
        Status = IoCallDriver(hookExt->FileSystem, Irp);

        if (Status == STATUS_PENDING) {
            DEBUG("[DIRROUTINE] IoCallDriver is pending [%X]");
            KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
            Status = Irp->IoStatus.Status;
        }

        IrpSp->Flags = ucFlags;
        if (Status != STATUS_SUCCESS) {
            DEBUG("[DIRROUTINE] IoCallDriver/WaitForSingleObject Failed [%X]", Status);
            break;
        }

the error code is NO_SUCH_FILES. but I don't understand what's wrong.
please let me know :'(

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