Copy the below code into the SQL window in phpMyAdmin and press GO:
DROP TABLE IF EXISTS `wp_memberlist`;
 CREATE TABLE IF NOT EXISTS `memberlist` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(50) NOT NULL,
 `phone` varchar(20) NOT NULL,
 `email` varchar(100) NOT NULL,
 `extra` varchar(100) NOT NULL,
 PRIMARY KEY (`id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;