Pokemon are you still trying to spam the wall of someone else to make a picture disappear ?
If so, you're losing your time, highscores won't post on the wall, and they won't unless the person plays the game anyway.
Else, when looking for examples, checking the how do I FAQ is generaly a good reflex.
And you can see a "Facebook" section with :
acebook highscore list - LINK
Reading this topic should help you.