Won't start (My Summer Car)

Collected the car, put all the tuning and the engine will not start. Filled all the fluids, all bolts and nuts wrapped up, drain all the rules, but when you put the tuning, then when you turn the key nothing, did not even turn on the sensor where the charge of the battery all the rules, but the fuel level sensor is at zero, although the tank is, the neck also, the nut is tightened, the filled fuel tank floor. What could be the problem? Downloaded save where the machine is assembled with a full tune and the same thing.