The Firmware Flash Tool works fine to write to the drive.
BTW, I emailed LiteOn tech support to ask them if they had any updated for the 451S because I couldn't find it listed on their web page with the other updates and they don't seem to even know they make it! They are so stupid! No wonder it didn't work right! Here's the reply that I got! LOL.
Dear Sir or Madam,
We don't have any information about this model name(DDW-451S). Would you
please contact its actual vendor?