Hard Brake pedal on 2005 dodge caravan

PROBLEM:



2005 dodge caravan, hard brake pedal and little braking. 

Problem Started after installing  new pads and bled brake lines. Can't get the pressure back right. 

Brake pedal stays hard and low braking ability.

Braking was ok before brake pads replacement.



SOLUTION:



This problem is noticed because brake line is not bled properly.There is
some air gap in between the brake lines