I think that unit is going to need the volume control trick. I know from my USA Classic DVD-102 (Mustek 560 clone), that the NEXT, STOP, STEP, PREVIOUS, NEXT trick has been taken out. Set the volume control at maximum (16) then keep presssing the volume "+" and "-" keys in sequence until you "VER #" in the upper right corner. Use the navigation keys to slew through 1 to 6, then to 255. 255 is zone free. Any unit that does not use the N.S.S.P.N. trick has firmwear above 2.01
Cheers,
Bill N. - New York