Error

SQLSTATE[HY000] [2000] mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please use an administration tool to reset your password with the command SET PASSWORD = PASSWORD('your_existing_password'). This will store a new, and more secure, hash value in mysql.user. If this user is used in other scripts executed by PHP 5.2 or earlier you might need to remove the old-passwords flag from your my.cnf file

#0 /web/htdocs/www.lasiciliainrete.it/home/wp/wp-content/plugins/awesome-media-gallery/amg/admin/library/com/mokoala/Core/Core.class.php(54): MK_Database::connect('mysql', '62.149.150.105', 'Sql298757', '4c887297', 'Sql298757_5')
#1 /web/htdocs/www.lasiciliainrete.it/home/wp/wp-content/plugins/awesome-media-gallery/amg/admin/index.php(16): MK_Core::init(Array)
#2 {main}