i've got this using OCD bk= FF FF FF FF FF FF FF FF and IRD is 3E ** ** **.
Using sdt I got Ird=F0 D33 ** ** and BK = 3E ** ** ** E3 ** ** **.
by looking at this first 4 digits are same fo IRD (OCD) and BK (SDT). i am confused which one is box key and which one is IRD.