Help cant downgrade pioneer dvr 103 from fw 1.90

I have tried everything and each time i get failed to upgrade offset (0000)
please can anyone shed some light on this.

thanks m8, but that didnt work either, i now get a cant find binary error, booted to dos and typed upgdvd.exe and got the above error, do i have to type the name of the firmware file as well?
going nuts with frustration here.

i don’t think so. It worked for me…

all im getting now is,
failed to upgrade offset (000000)
ive repeated it a few times as well