I feel incredibly stupid right now. I STILL don't understand this. I did try copying and pasting (i'm pretty sure i pasted the right thing in the right place), but it just showed the 404 error and said the page didn't exist. Grrrr! Can someone maybe give me a hint as to what I'm supposed to do? I've read all of these posts and am still really confused.
You probably had a minor pasting error, OR you somehow pasted the right filename into the wrong directory.