SRS light staying on

Hi,
My 97 model year 3.9 V8 Gas , has its SRS light on (has since i purchased it).
It has been to an approved repairer who plugged it in to their laptop etc, he found it was not talking to the ECU.

Therefore he diagnosed a blown ECU due to impact etc.

Ive just fitted a brand new one fron L/R ,only to find its the same.
I did wait for a while with the battery disconnected to allow the ecu to power down.
But still the same fault, does anyone have a clue please??
thanks
Gareth
07717 803649

Make sure the ecu has power and earth to it, this may be the reason why the laptop didn't communicate with it in the first place.