Fresh_Bananas Theme problem

I’m a fairly new user, but have uploaded a plethora of different themes to my wordpress recently and all have worked except fresh_bananas (downloaded here @ the bottom of the page: http://nokrev.com/work/).
When I go to my index.php page (after having uploaded the theme and applied it) this is the error I get:

Warning: main(wp-blog-header.php): failed to open stream: No such file or directory in /homepages/12/d91588583/htdocs/wordpress/wp-content/themes/fresh-bananas/header.php on line 1

Fatal error: main(): Failed opening required ‘wp-blog-header.php’ (include_path=’.:/usr/local/lib/php’) in /homepages/12/d91588583/htdocs/wordpress/wp-content/themes/fresh-bananas/header.php on line 1

Help! Is this a problem due to the theme itself or am I making some mistake with uploading the theme that I haven’t made with the other themes I’ve uploaded?