Need help with HP XBox Game!!

[Prof. Rick Stone]

I have the "Chamber of Secrets" XBox game.and Im stuck in a spot that 
I dont know how to get out of...does anyone else have this game that 
can tell me what im supposed to do? It's the part where Professor 
Mcgonagall has sent Harry to get the Aberforth Spellbook,and he goes 
into this big room with a stone gargoyle at the end,and has to avoid 
these ghosts,and there's 2 stairways in the middle,etc..anyway,I've 
used all the spells Harry has and still havent found a way to get out 
of this room...can anyone help?