photo theme issue

Hy,

i’ve got a blog (https://redsilk.thehex.ro/wp-admin/) on which i’ve installed Viewport 1.1 theme (a free one).

however, as u can see, images of the template are not shown (arrows, background etc…). i think it’s because of the subdomain, however a piece of stylesheet with image looks like:

background: transparent url(images/navbar/left.png) no-repeat 0 0;

any ideas what to do?
thanks a lot