I think I read somehwere that if you put the scratching post near a cats food, they will start to use it, as cats find in relaxing to stretch and scratch after eating - I know my 2 do !
And as far as stopping the scratching, I don't know, but I know google is always good for answers.
Does your cat get out regularly ?
I ask because one of mine was terrible for chewing wires, I went through 2 about 4 power cables, all the wires for my dolby surround hi-fi, 2 pairs of headphones, a printer cable and a mouse cable before she was old enough to be let out, and then it stopped completely.