took my series 2 rs turbo off the road to have the bonnet and intercooler changed , car was running perfect and started 1st time every time before taken off the road . now i removed the battery a month ago to use on another car , now today put it back on and turned the engine over , started for 2 seconds then died , now wont start & no fuel pump noise , fuel pump relay looks in top shape and tryed working it manually but still no power , the car is fitted with a aftermarket immobiliser but im sure thats turned off every time i have tryed , little stumped now - all fuses checked too ????