Check the clear fuel line after the filter to the HP pump to see if there is any air or fuel going to your pump. If you have good fuel flow, then it looks like your pump may have gone, but check your return first as they can airlock. If you have loads of air bubbles in the line, get some fuel flowing first.
Bleeding these can be a ******, I use a large syringe on the return line - pretty much as ElsaWin says. You can put an inline squeezy-ball hand pump type primer before the filter, and pump until fuel comes from the return, or pour fuel down a funnel in a pipe held higher than the filter.
Check the black T-piece on the filter, I managed to nick the seal during fitment which was a ****** to find. I poured fuel over the filter, cranked it over, then saw bubbles and heard fizzing around the valve, and listen around the injector return pipes for hissing/fizzing as these can also cause grief
If you do get it running, do not rev it for 10-15 minutes. The aforementioned Diesel Bob advised me it can take this long to clear all the air from the pump and any cavitation at revs can be terminal.
If you do have to get your pump done, as Adamss24 suggested, go to
Diesel Bob Tuning - Home. The cost will vary depending on what is needed, and I would advise getting the inectors done at the same time. It is not cheap, but worth doing.