When I install the plugin I get the following error message

Hi...

When I install the plugin I get the following error message that appears on the header of the admin area and the public facing site:

Warning: chmod() [function.chmod]: Operation not permitted in /home/jugula/public_html/wp-content/plugins/whmcs-wordpresss-integration/whmcs-integration.php on line 214

Any help greatly appreciated.

Thanks.