phpcms安装时出现Errno:1067错误的解决办法

MySQL Query : CREATE TABLE `phpcms_c_down` ( `contentid` mediumint(8) unsigned NOT NULL, `template` varchar(30) NOT NULL, `content` mediumtext NOT NULL, `version` varchar(20) NOT NULL default '', `classtype` varchar(20) NOT NULL default '国产软件', `language` varchar(20) NOT NULL default '简体中文', `copytype` varchar(15) NOT NULL default '免费版', `systems` varchar(100) NOT NULL default 'Win2000/WinXP/Win2003', `stars` varchar(20) NOT NULL default '★★★☆☆', `filesize` varchar(20) NOT NULL default '未知', `downurl` varchar(255) NOT NULL default '', `downurls` text NOT NULL, `groupids_view` tinyint(1) unsigned NOT NULL default '0', `readpoint` smallint(5) unsigned NOT NULL default '0', PRIMARY KEY (`contentid`)) ENGINE=MyISAM DEFAULT CHARSET=gbk 
MySQL Error : Invalid default value for 'classtype' 
MySQL Errno : 1067 
Message : MySQL Query Error