help!

umm,ok,this is really complicated but.....ok,when u go into glanhilda of gorsemore corridore(on the third floor{defence against the dark arts})instead of going to the defense against the dark arts classroom go down the hall,up the stairs,and there is a tapestery on the wall,and then after u use the draconifer spells(w/hermione) on the statues go in the storeroom.in there there r a bunch of bookcases,on top of a bookcase is a chest.how do u get up to it?and whats in it?

I think that you are confusing two parts of the game

in that store room the chest is on the floor (not sure what is in it)

but on the 6th floor there is a cabinet with a chest on top of it, use Hermione's Glacius spell on the puddle of water by the door, and then pull it over by the cabinet and climb on top of it

hope that helps