a) Are the adjusted properly.
b) Are they contaminated.
If they're not adjusted properly, you need to fix it so that the pads run free when you're not pulling the lever but grab as soon as you do.
If you do adjust them and they are bed in, then chances are your rotors/pads are contaminated. Rubbing Alcohol wont to bumpkis. Use EBC non chlorinated brake cleaner. Spray in across the rotor surface on both sides in front of the caliper. Then reset the rotor position and clamps on over the sprayed portion of the disc. Then lightly hold the the brakes down and push the wheel through it's full range of motion. Repeat until the whole things squeaks. That will tell you when it's clean.