Brakes

[aluckyguy75]

I have a 1990 Mazda MPV...I am having some problems with my brakes...I tapped on the brakes the other day and they went to the floor the antilock brakes light came on and it finally stopped. Got it home just fine no problems checked the brake fluided and it needed some so I added some. Now the brake light and the antibrake lights come on and the brake pedal goes to the floor and it is hard to stop I really need help this is my only car and I have to be able to get my kids to school it's to cold for them to walk please help me

I replace the mastercycler and the booster and I'm still having problems stopping and the lights come on we looked for leaks didn't find any and we are not losing any brake fluid....help please