Brake pedal goes to the floor?!?

[jbppug]

Hi guys i recently changed the front discs and pads on my xud and now the pedal goes to floor. If you pump the pedal it gains pressure and they feel ok but then instantly the pedal goes to floor. I have bled the system to remove any possible air in the system, and they are still the same, i have checked the resevoir level when pumping the pedal to see if it goes down in case of a leak but it doesnt. Does anyone have any ideas as its pissing me off now lol. Thanks in advance