That's strange... O.o
Delete cache and cookies and reload the page again. If it still doesn't work, please let us know.
Edit: It's getting even stranger. After we checked your nickname we stumbled across this:
28 accounts for the same nickname, most containing 0 ponies, some having one pony and one account with the 5 ponies you told us about. Did you have massive problems while doing your registration? No matter if Poneyvallée, Facebook or your internet connection in general?
I assume it's a Facebook-problem and would recommend to play on the game-server of Ponyvallée itself by creating a new account with a new nickname: http://www.poneyvallee.com