some dogs are just scared of those kinds of floors. I had a dog staying with me for a month that had never seen anything but a kennel and grass. He was afraid to come into the hous, let alone walk on the hardwood and tile floors. He would slink against the cabinets or not move at all.
Luckily he really liked food and me, so I dropped a treat trail on the floor little bits at a time and lured him on them till he got used to them. His food drive was a lot hight than his fear of the floors. thankfully he had good nerves and stuff so he got used to them relatively quickly.