3.5" sony mpf920 drive B

[Vitop69]

Hi everyone.
I have a cpc464 with 3" fd-1 drive.
I modified a 3.5" drive sony mpf920 to have the ready signal. 
I modified the ddi-1 to power 5v from the cpc 464.
I disconnected the 5v from the fd-1 on the 34 pin cable.

FD1 as drive A.
3.5" Sony as drive B.

disckit2 give me 2 drives. Ok.
but when I try to format it gives me error on track 0. Missing track 0.

any help?