Mysql出现Error Code: 1644. Strange error!如何解决

Question

创建了一个触发器，插入任何数据出现下面错误：
Error Code: 1644. Strange error!

<code>DELIMITER $$
CREATE DEFINER = CURRENT_USER TRIGGER `test`.`gender_BEFORE_INSERT` BEFORE INSERT ON `gender` FOR EACH ROW
BEGIN
    IF  NEW.gendercol<>1 or  NEW.gendercol<>2 THEN
    SIGNAL SQLSTATE '45000'
    SET message_text = 'Strange error!';
    END IF;
END$$
DELIMITER ;</code>

建表语句：

<code>CREATE TABLE `gender` (
  `idgender` int(11) NOT NULL AUTO_INCREMENT,
  `gendercol` int(11) DEFAULT NULL,
  PRIMARY KEY (`idgender`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
</code>