Problemi installazione wp-member

cerco di istallare wp-member ma mi appare questa scritta

Warning: realpath() [function.realpath]: SAFE MODE Restriction in effect. The script whose uid is 1393948 is not allowed to access /usr/local/php5-fcgi/lib/php/extensions owned by uid 0 in /membri/freeroll/wp-content/plugins/wp-member/wp-member-main.php on line 2
Site error: the file /membri/freeroll/wp-content/plugins/wp-member/wp-member-main.php requires the ionCube PHP Loader ioncube_loader__5.2.so to be installed by the site administrator.