SPACES- won't let me open iTUNES

I am totally retarded with computers, I have the leopard 10.5 and don;t really know how to use it.
I know that somehow i got into spaces (not sure still how) but basically i can access everything on my doc except itunes. It opens properly but it shows on the top that it is open but i can only see it briefly if i press F3 and see the screen shot of itunes, but everytime i go to click it it disappears.....please help me! i am wasting away without my music.

BUT MY SPACES IS not checked as enabled

Press F8: iTunes is basically already open on another Desktop (= another Space).

F8 will show you the full overview and then you can just click the space with your iTunes window.