Does not work with php-5 Activated it and got…

I activated the plugin and got:

2013/05/21 05:28:33 [error] 1299#0: *10994 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Call-time pass-by-reference has been removed; If you would like to pass argument by reference, modify the declaration of add_role(). in /var/www/aaa.org/wp-content/plugins/lepress-20/classes/teacher.php on line 43" while reading response header from upstream, client: 222.68.248.34, server: aaa.org, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "template.aaa.org"

Apparently it doesn’t function for PHP 5.4

http://wordpress.org/extend/plugins/lepress-20/