Where is the gold brick in the moving staircase? I followed these directions: http://360achievementguides.com/lego-harry-potter-years-1-4-gold-brick-guide-hogwarts-castle.html and it doesn't work.
I have the white arrow blinking over the little room that is off of the staircase, through the small blue door. The one that takes you into a small room upstairs with blow up heads and a couple TVs and it's raining out the window. It was where I got a red box and gave it to the owl. Once I enter the room, the white blinking arrow is gone. I have all the crest pieces and all the red boxes, I only have 5 gold bricks left to find! Help!!