我在安装qmail时，用vpopmail添加域和域用户时提示下面错误，数据库配置运行也没有问题，已经卡在这两天了，无法解决，麻烦高手帮忙解决一下啊，摆脱了，提示如下
[root@localhost vpopmail-5.4.10]# vadduser -q 10485760S admin@hmky.com sailing
vmysql: error creating table 'dir_control': MySQL server has gone away
vmysql: error creating table 'dir_control': MySQL server has gone away
vmysql: sql error[b]: MySQL server has gone away
vmysql: sql error[3]: MySQL server has gone away
vmysql: sql error[2]: MySQL server has gone away
Failed while attempting to add user to auth backend
Error: no auth connection
[root@localhost vpopmail-5.4.10]# vadddomain domain.com xukixu
vmysql: error creating table 'dir_control': MySQL server has gone away
vmysql: sql error[b]: MySQL server has gone away
vmysql: sql error[3]: MySQL server has gone away
vmysql: error creating table 'dir_control': MySQL server has gone away
vmysql: error creating table 'dir_control': MySQL server has gone away
vmysql: sql error[b]: MySQL server has gone away
vmysql: sql error[3]: MySQL server has gone away
vmysql: sql error[2]: MySQL server has gone away
Failed while attempting to add user to auth backend
Error: (vadduser) no auth connection
