AFAIK the A3000 uses just the opposite drive address method than the A2000 (from where the A354 is probably coming): on the A2000 all drives are set as address '1' and A3000 ones are all set to '0' with the cable twist morphing '0' to '1' and vice versa.
So with one A3000 and one A2000 drive beyond the twist, both are running at the same address and none works.
If this is correct, the easiest way is to use a straight cable without a twist and you should be set. Otherwise you'd have to change the address on one of the drives.
