User blog:Garlite./Lego Harry Potter Help

I need help! I need my last Golden Brick and in says it is in the Clock Tower! (the place in the main courtyard behind the green lock) I think I am stuck. I hit the painting. I built the thing, I go to the snake and it will not let me go to him. Did I already talk to him? My Golden Brick Detector it still pointing there. Is a Glitch from another Extra? PLEASE HELP!!!!! NEED LAST ONE TO GET VOLDY!!!! -Gear