Next gen flash viewer background color change

I did a search on this forum in case it has been documented but I can’t find it. I am running WP 2.5 with the Revolution theme and I just installed NextGen Gallery and the Flashviewer plugin. Everything works great, even my gallery is working fine except that whenever I use any of the flashviewers (simple, tilt or auto) I get a black background which is not exactly pleasing to look at against my very light background. Does anybody know how I can change this? Even when I added the path to a .jpg image, it didn’t change anything.

Thank you!