Do you have the url so we can have a look?

Have you tried this:
body#Body {}

you may try put a border on above line and see if it works.

Regards,
andy

I'm quoting a post of mine - found here.

2 things, that might help...

1. DNN is actually a form.  The form's ID is #Body - this is thus DNN's "body" id.  You would need to tell this selector to have 100% height as well, so that your background doesn't "run out".
2. Then there's body, which is browser body.

You can learn more about this at this post - http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/109/threadid/282081/scope/posts/Default.aspx

Hopefully it helps a little.  But read the skinning guide.

Jon

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