Fuel system issue - not starting
 

I have an 2006 Audi A4 Quattro 2.0L Turbo. I was driving and the car just stopped. I have a pressure tester that I used to test the fuel line pressure. I assumed it was the fuel pump. So, I replaced it. The car still does not start. But, when I spray ether into the throttle body, it starts. What could be the issue ????? Please help