I just flashed it with the RPC1 hacked Optorite 2.50 firmware for the DD021.
I found out it was a DD021 by peeling off the sticker with the serial number on it because I could tell it had one underneath it.
The serial number started with MS8404, which is the MSI DR4A, and that definately is a DD021.
I backup xbox games and all my burns in GDF format wouldn't work, I thought it was the media I was using, but all different types failed. That wasn't my end of the troubles either.
With this new firmware everything works 100%.
Thanks for the step in the right direction guys and a big boo to Mitsubishi who provides @#$# all support.
I hope this helps other people out there who are stuck also.