It's because yours is an early mk5. Wiring is different, exactly how I don't know.
i thought id just plug mine straight in without swaping wires and it ran fine which was strange
Fuel pump wire is something to do with wire 1, as I tried this first and it didn't work.
Personally, I'd try an ecu from a manual 2L mondeo. Everyone else has had a 2L ecu working fine apart from you 2 guys, and you both have auto ecus.