CDRW Ricoh MP7163A went unrecognizable

I need an advice how to reflash my CDRW Ricoh MP7163A under the DOS.
I contacted Ricoh support service but was told that the current firmware that is available for downloading from their web site works under windows only. Since the CDRW cannot be recognised during the bootup, simply you cannot reflash the firmware under the windows çouse windows cannot see the driver as well.

I’ve been using this drive successfuly for more than a year and everything is connected in a same way it was before-I rechecked it.(The light of the Ricoh MP7163A’s is lighting (yellow) from the time I turn my computer on until the moment I turn my computer of, just lighting -no flashing or anything else).

Kindest regards to all participants in this forum,
flash-hater