Neo 2.5 DVD-Key PS2 DVD Backup booting problem

[loffler]

I have exactly the same setup except mine is PAL and all is perfect first time.
PAL V4, Neokey 2.5, AR 1.93
All I can say is check your wires, points and solder for crossing tracks. They are usually the main problems.
Where did you get the chip from? Mine was from Lik Sang.
Good luck