Where can I get an ECU that I brought tested? It's a chipped S1 ecu, I fitted it to replace the S2 ecu that was incorrectly fitted when I had the car.

It started first time, no problem.
Ran it up to temperature, all ok.
Moved the car out of the garage, easy peasy.
Got in, went to drive off, it died and refused to restart.

Refitted the old ecu and it started straight up so herein lies the problem.

Does anyone test them at all?