Failure when calling FltCreateFile in PreCreate dispatch routine in file system Minifilter driver

When using the following codes to create/open a file, status will be STATUS_OBJECT_PATH_SYNTAX_BAD after calling FltCreateFile, please give me some hint, thank you very much.


RtlInitUnicodeString(&sFileDosFullPath, L"\\??\\D:\1.doc");

// init object attribute
InitializeObjectAttributes(&ob, &sFileDosFullPath, OBJ_KERNEL_HANDLE|OBJ_CASE_INSENSITIVE, NULL,NULL) ;

// create/open file
uCreateDisposition = Cbd->Iopb->Parameters.Create.Options>>24 ;
uCreateOptions        = Cbd->Iopb->Parameters.Create.Options & 0x00ffffff ;
uShareAccess          = Cbd->Iopb->Parameters.Create.ShareAccess ;
uFileAttributes           = Cbd->Iopb->Parameters.Create.FileAttributes ;

status = FltCreateFile(FltObjects->Filter,
                                        FltObjects->Instance,
                                        &hFile,
                                        uDesiredAccess,
                                        &ob,
                                        &IoStatus,
                                        NULL,
                                        uFileAttributes,
                                        uShareAccess,
                                        uCreateDisposition,
                                        uCreateOptions, 
                                        NULL,
                                        0,
                                        IO_IGNORE_SHARE_ACCESS_CHECK
                                        ) ;
if (!NT_SUCCESS(status))
{
       FltStatus = FLT_PREOP_COMPLETE ;
       __leave ;
}