User blog:TroopDude/Wiki background image error

I'm an admin on 28 Days Later Wiki, and am having trouble changing the background image. Whenever I replace the background image with a different one, as soon as I save the change, it just reverts to the original background image. I've tested other wikis I'm an admin on, and I seem to only be having this problem on 28 Days Later Wiki. If anyone can tell me how to solve this, please leave me a message ASAP. TroopDude 19:04, May 12, 2012 (UTC)