I have an ESP LTD MH-301 which has floyd rose tremelo (double locking - i dont know if all floyd rose are), and ever since the last time i changed strings its been messed up. It sits right, the action is lined up perfectly, but when I push down it stays flat, when I pull up it stays sharp.. I'm just wondering if i screwed something up somehow, but i dont know how to see if everythings set up right

anyone know anything about this kind of stuff?