[Sudden2]

um, so your trying to get a Bg change? Or is the normal background not showing up.

if the bg isnt showing up, you have to code the path to the bg correctly. It has to look like this:

#BANNER:[song name]-banner.png;
#BACKGROUND:[song name]-bg.png;
^[this is how I do it]

If you use photoshop where .png images are save as [song name] copy.png, you have to have the code as

#BANNER:[song name]-banner copy.png;
#BACKGROUND:[song name]-bg copy.png;

If you save it and change it where the "copy" isnt on there, then StepMania/DWI wont read it and you'll get the alternate background and or banner.

As for BG changes, I don't know.

EDIT: Oh! Almost forgot, you HAVE to have the semicolon [;] after each coding.