It could be a few causes, 1 theres no fuel getting to the injectors because of air, 2 the other which i suspect is that the timing is completly out.
You need to check if fuel is getting to the injectors unscrew each of them and turn the engine over and see if they squirt diesel out if it is then go to option 2 and check timing is aligned if this isnt then you will have no joy at all.
Ian Mechanic
April 2009