Gecka bgStretcher

HI there,

I am using the Responsive theme for a website. I needed a background stretcher that could easily put the same background on every page and resize it in case. As simple as that. So I came across bgStretcher. It works perfectly, doing exactly what I want it to do, but there’s a but….the logo is invisible, the main menu almost (looks like it has transparent background), the bottom menu and footer disappeared. The background kind of covered them.
Is there a way to fix this issue or should I maybe chose another plugin? Which one would you suggest? I don’t need a slideshow, a different image on every page, don’t want to customize everu single page/post I add….I simply need a background stretcher!

Thank you guys!
Max