[MadDogBV]

If your banner is complete, make sure that it is in either PNG or JP(E)G format. Rename the banner as the name of the folder it is in plus "-bn" then extension. For instance, if I made a banner for the folder "Pump It Up - Can Can", then I would save the banner under the folder as "pump it up - can can-bn.png". I also suggest that the banner be 256x80 pixels. Then, go to the menu, go to options, and then Reload Songs/Courses.

If for some reason that still doesn't work, open up the .SM file in Notepad. There should be a line that says something like:

#BANNER:;

If there is, add the name of the banner, so it would look something like this:

#BANNER:pump it up - can can-bn.png;

If that does not work, your banner or stepfile may be corrupt. Remake either of them. You may also want to try reinstalling StepMania.