无法打开extmail 页面

安装完extmail后，登录出现如下错误：

Can't locate DB_File.pm in @INC (@INC contains: /var/www/extsuite/extmail/libs /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at /var/www/extsuite/extmail/libs/Ext/DB.pm line 81. BEGIN failed--compilation aborted at /var/www/extsuite/extmail/libs/Ext/DB.pm line 81. Compilation failed in require at /var/www/extsuite/extmail/libs/Ext/Storage/Maildir.pm line 576. BEGIN failed--compilation aborted at /var/www/extsuite/extmail/libs/Ext/Storage/Maildir.pm line 576. Compilation failed in require at /var/www/extsuite/extmail/libs/Ext/App.pm line 28. BEGIN failed--compilation aborted at /var/www/extsuite/extmail/libs/Ext/App.pm line 28. Compilation failed in require at /var/www/extsuite/extmail/libs/Ext/App/Login.pm line 16. BEGIN failed--compilation aborted at /var/www/extsuite/extmail/libs/Ext/App/Login.pm line 16. Compilation failed in require at /var/www/extsuite/extmail/cgi/index.cgi line 20.

收集解决方法：http://www.extmail.org/forum/viewthread.php?tid=23457&extra=page%3D1&ordertype=1
貌似这个哥们的方法，可行，等明天试试！！

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经过这几天的测试，出现这个问题是MySQL的版本太高了，最佳配是5.1，千万不要选择5.7！！！这是坑啊！！！