tried adding a background image – seems to have broken my blog (urgent)

Hi all,

I’m going through a bit of a disaster at the moment. I’ve tried to add an image in the stylesheet file through my WP dashboard. I didn’t actually have any idea how to do this so I tried a trial and error method. I put the url(…) code in a section that had a img { border } or something. my blog or the dashboard will not load and I fear that I’ve completely buggered it up.

is there any hope for me to fix this?

cheers.

edit: the link is http://www.rbdmedia.co.uk/blog/

I’m using the monochrome 2.6 theme aswell.