Power FC problems

[Kamahl]

Hey everyone, I have an S14 SR20DET that's almost ready to be tuned. So I plugged in my new Power FC and Commander, and turned the key to the on position, and the main relay doesn't turn on, fuel pump doesn't turn on, my avc-r doesn't turn on, and neither does the commander. Dash lights, radio work fine. So I put the factory ECU back in there and put the key to the on position and everything came on like it's supposed to. So I went to the shop and tried a different PFC, thinking mine was faulty, and my car did the same thing. I'm really baffled by this as the PFC should be plug and play...Any thoughts?Thanks