haha good luck with this one most cats are stubborn, and they wont do anything w/o reason to do it. i found this:Lesson 6- How to get Kitty to prefer the post.
Remember that an important part of scratching is the cat's desire to mark a territory, so a scratching post should be in an area that's used by the family, not hidden in a back corner. After a time you can move the post away to the periphery of the room, but you'll need to do this gradually.
Initially, put the post where your cat goes to scratch. This may be by a sofa, a chair or wherever Kitty has chosen as her territiory, and you may need more than one post to cover her favorite spots. Security is a major factor in making the post appealing to your cat. If it topples or shakes, she won't use it. It should either be secured to the floor or have a base wide enough and heavy enough to keep it stable.
Encourage Kitty to use her post with clever enticements. Feed her and play with her by the post. Rub dried catnip leaves or powder into it. Make all the asssociations with the post pleasurable. Reward her with a favorite treat when she uses it. Have her chase a string or a toy around the post or attach toys to it, which will result in her digging her claws into it. Eventually she will learn to love it and regard it as her own. It's also a good idea to put a post where Kitty sleeps. Cats like to scratch when they awaken, especially in the morning and the middle of the night. If space permits, a scratching post in every room of the house is a cat's delight. The most important place is the area of the house in which you and Kitty spend the most time. I have many sisal posts in my house, yet often in the morning my cats line up to use the one in the living room.
If at first Kitty is reluctant to give up her old scratching areas, there are means you can use to discourage her. Covering the area with aluminum foil or double-sided tape is a great deterrent. These surfaces don't have a texture that feels good to scratch.
Remember too that Kitty has marked her favorite spots with her scent as well as her claws. You may need to remove her scent from the areas you want to distract her away from. You will find pet odor removers in pet stores and many supermarkets as well.
Cats have an aversion to citrus odors. Use lemon-scented sprays or a potpourri of lemon and orange peels to make her former scratching sites less agreeable to her.
If Kitty still persists in scratching the furniture, try squirting her with a water gun or a spray bottle set on stream. Another option is a loud whistle or other noise-maker. You must employ these deterrents while she is scratching for them to be effective. The point is to establish an aversion to the spot you don't want her to scratch.