I would start moving the pads closer to the door and then outside. Eventually he/she'll learn. Make sure you positively reinforce every success and try to ignore the mistakes. If you catch the pup in the middle of a piddle (so to speak) pick them up and run them outside. (Messy but effective). Good luck, we've managed to teach everyone of our dogs to only eliminate in tall prairie grass (where I can't see it and don't have to pick it up.) Our neighbor's dog craps in our yard (despite being 300 yards away and both of us living on 6 acres). I always carefully pick it up and put it outside his shop door after he goes to work in the shop. I haven't been caught yet, but I hear him yelling at the dog (I think it's name is "Damn It", I know it's a male because he's the "Son of a"...) Not sure I'm accomplishing anything, the dog is obviously afraid to crap in it's own yard, after all it gets yelled at for crapping in my yard.
"My KLR belongs to God, when he wants it clean he washes it."