Blank Page after Header in Admin Pages

Hi,

I'm looking for some help as i am unable to see anything apart from the header with the menu options etc when logged into my admin area,

apologies in advance if this has been covered before,

i have pulled up the logs and can see i get the following:

PHP Warning: require(includes/boxes/modules_dhtml.php) [<a href='function.require'>function.require</a>]: failed to open stream: No such file or directory in /home/tranquilwb/public_html/cart/storefront/includes/header_navigation.php on line 20

where do i go from here to get it working?

this is a fresh install and i followed all the steps from the install guide, it is version v1.3.9h,

any help or directions would be greatly appreciated,

Regards,

Sorry just realised i'd been a doughnut - had a file missing:oops:

No worries. We like doughnuts here. :yes: