No... You did. it sounds like the caliper/piston(s) are binding
Take it off completely. Stuff a rag between the piston(s), and the housing, and use compressed air to "blow the piston(s) out. That will show what is happening inside.
Clean it all up or replace whatever is bad, and reinstall the caliper. Use the air again to squeeze the pads tight, and re connect the fluid line. Open the bleeder, and fill the reservoir, Squeeze the lever, and look for air bubbles coming from the tiny holes inside the Res. and keep refilling till fluid comes out the bleeder. When it starts to come out close the bleeder, and keep squeezing until it starts to "firm up" Once firm squeeze, and hold. Open the bleeder and expel any bubbles. Tighten the bleeder and release the lever. Repeat that till it works right.