IF you do have spark AND the injectors sound like they're clicking with it cranking over [ listen with a long screw driver, tip on an injector or it's connector, handle on your ear ], AND your SURE the fuel pump relay's GOOD, the DME is 'seeing' everything it needs to start the engine, EXCEPT turning on the fuel pump. Unusual but i think i've seen it before. AGAIN, make sure EVERYTHING else is present. I just had a silly thought about your OBC being locked in 'CODE' [driver input anti-theft] but that keeps the MAIN relay from energizing. This advise is only worth what it cost you but it sounds like you've a failed DME control unit.