Harry Potter fans ...............?

I know that this isn't really a book question but I asked my question in the wii section and got not 1 answers - so I'm hoping a fellow fan of the books has also played the game. So on Harry Potter and the Order of the Phoenix on the wii - where are Luna's belongings? I've found 4 outta 5 and I'm just missing 1 - I've got 1 in the great hall, 1 in the library, 1 in they clock tower courtyard and 1 in a corridor (i think on the 5th floor) .... Thank You I really need a answer