Hello again :)

I am having such trouble trying to figure out where I close up a gap. I have disabled the breadcrumbs that sit at the top of the page but there is a huge gap above categories and the top main banner image (below the pink nav bar). How do I close that up? I have looked at maincontentwrapper but that didnt do anything at all. I am probably being a dimbo but any pointers would be so appreciated :) Here is a link to the not yet live site:

http://organ-nics.com/index.php?main_page=index

Thanks