Renault Grand Scenic 1.9dci fuel filter problem?

I changed the fuel filter yesterday but cant get any pressure on the priming bulb at all, the filter housing top is on straight and the tab lined up, tried priming with the bleed screw open and closed just nothing there, the bulb feels like squeezing a split tennis ball.
I can't see any leaks, car is stuck on the drive and wife's not impressed