cannot start me peugeot partner combi?

I have recently replaced the engine in my combi van (2002) I have swapped all the ancillaries including the pump now the engine is in the van there is no way it will start i have checked all the usual stuff fuel oil changed the timing belt (lined all the holes up) it is the DW8 engine has anyone any idea what could be preventing it from starting any help would be greatly appreciated thanks in advance 01773 530703