Not starting can be a host of issues. I would do a search on that.
If you hear the pumps running, thats good. But do you get enough fuel to the injectors? You can loosen the fuel line there and see if fuel is coming out when someone else tries to start the car. Do you have spark? How did it develop? Did the car run before you changed the fuel filter and now it won't start? Are you sure there are no kinks in any lines?
Sorry I can only respond in general terms, as I don't know your car.