I know mines a petrol V8 but I had the same thing happen to me, I was running on literally empty when I put an extra few liters in, tried to take it for a little spin and she conked and wouldnt start just like yours, I put £15 quid juice in and she fired up shortly afterwards, the system has return fuel lines and the whole system has to be full of fuel and free of air.
I would suggest what Noisy sais and sling another £15 juice in, cant do any harm.