[Steve Tinker]

Brett, you should hear the fuel pump run for a couple of seconds (to build up pressure) when you first switch on the ignition.
Have you checked the fuel filter? If the filter is passing fuel OK, then it certainly sounds like you could have a faulty pump or pressure regulator or a hose has come off the pump when you installed it. The only real way of telling is to check the pressure @ the rail with a pressure gauge - I think the pressure should be about 3-4 bar.
Use the search function above - lots of no start / fuel pressure questions and answers.