It could be that after you assemble the scratching post in your home, your cat ignores it. If this does happen, there is a an easy solution. Cats love to play, but they can be a little wary of new objects introduced into their environment. You can get your kitty to love their new toy, just by using a few simple tricks.
One option is to put some of your cat's toys, blankets or their bed on the scratching post, so that it begins to smell familiar. You can also place some little morsels of their favourite food on the scratching post, which will be sure to reinforce a positive association. If your kitty is very playful, try moving the different components of the scratching post, to try and attract your cat.