Modules Tab is blank in Back Office (Admin Modules)

[teppey]

I just upgraded to Prestashop 1.4 and when I click on the Modules tab in Back Office there's an error:

Warning: constant() [function.constant]: Couldn't find constant _MEDIA_SERVER_1_ in /public_html/prestashop14/classes/Tools.php on line 1533

Warning: require(/public_html/prestashop14/classes/rating/_drawrating.php) [function.require]: failed to open stream: No such file or directory in /public_html/prestashop14/classes/Module.php(408) : eval()'d code on line 3

Fatal error: require() [function.require]: Failed opening required '/public_html/prestashop14/classes/rating/_drawrating.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /public_html/prestashop14/classes/Module.php(408) : eval()'d code on line 3

the line in Tools.php is:

if (($value = constant('_MEDIA_SERVER_'.$nb_server.'_')) && $value != '')
return $value;

any help would be appreciated

[teppey]

it seems the module file has been changed after the update, I just copied the files to the new location and it works