new front disk brakes lock up.....

I have a 1974 duster power brakes , front disk , back drums,new porp valve, new lines, new calipers, new drums and shoe, new master, new power booster......

I started the car for the first time and applied the brakes and the calipers locked up...I used the bleeder to release the pressure but the next time i applied the brakes the same thing happen....


please help