Give the carpet a good scrub and use an enzyme cleaner to clear any left over odors that only she can smell. Then I recommend putting a potty pad down in that spot, since she seems to like going to that area. Eventually you'll be able to move the pad to a better spot and she should go to the pad. Yorkies are funny little creatures, I went through this around x-mas, I had the tree set up and for some reason Rizzo couldn't stop peeing on the tree skirt, I put a pad right where he kept going and after a week I moved the pad next to the tree skirt and he went to the pad instead of the skirt. I did manage to get it pretty far from the tree and presents, but then x-mas was over
Good luck!