Please help!!!

okay i have a background i made for my story and it won't shop so now it's boring i've been trying to fix it but i don't know what's happening, can anyone help me? it'd be much appreciated.Now the story is called I go to academy asshole, but i haven't updated the chapter yet, but i have the layout and it works there but when i click to make sure its looks fine it just has a pruple background and it's frustrating me, so please help, and tell me if i might just be seeing stuff, haha. It worked on my other story where you copy the picture to a new internet tab ad then copy what it says in the html, i think that's what it's called but anyway, it doesn't work with my other pictures either, so i don't know.

THANKS :)