Hello. I have a big problem. How i can unlock disk from Avic hd3 ? I have to unlock disk on my PC because my Radio didnt see a disk and i have only this communicat " Cannot use HDD" so i Cant unlock this with TEST DISK CD. Please Help Me. I have 2 locked disk and one which work but Original Audio CD cant be recorded to HDD. I dont Know Why :/ Mp3 CD works but Original Audio CD didnt work :/ I have ISO with a system from z3 but i cant unlock this Disk.