请教igenus连mysql问题。

providence

进入igenus的mail用户页面报这个错。在login.ini配置是root用户连接mysql，为什么会报这个错。
Warning: mysql_connect(): Host 'first.yaya.com' is not allowed to connect to this MySQL server in /var/www/igenus/login.php on line 61

Warning: mysql_select_db(): supplied argument is not a valid MySQL-Link resource in /var/www/igenus/login.php on line 62

Warning: mysql_close(): supplied argument is not a valid MySQL-Link resource in /var/www/igenus/login.php on line 158

Warning: Cannot modify header information - headers already sent by (output started at /var/www/igenus/login.php:61) in /va$CFG_BASEPATH = "/var/www/igenus";
我的config_inc.php的mysql部分配置如下：
// Mysql
$CFG_MYSQL_HOST = 'first';
$CFG_MYSQL_USER = 'root';

$CFG_MYSQL_PASS = 'mysql';
$CFG_MYSQL_DB   = 'vpopmail';
r/www/igenus/login.php on line 162