Error after plugin installation

Hi I installed the €9 maximenu ck plugin.
I am now getting the error when I open a menu item in Joomla
Warning: fopen() [function.fopen]: URL file-access is disabled in the server configuration in /home/mannaorg/public_html/web/libraries/joomla/filesystem/file.php on line 240

Warning: fopen( www.mannaorganicstore.ie/web/plugins/sys...s_maximenu_ck-en.xml ) [function.fopen]: failed to open stream: no suitable wrapper could be found in /home/mannaorg/public_html/web/libraries/joomla/filesystem/file.php on line 240

hi
by downloading the plugin you should have seen on my page that your server must have fopen enabled for this to work.
Please email me and I will send you a modified version