关于vpn服务器的问题

lksj

配置之后，重启的时候出现下面的错误，怎么回事啊？？我是用ssh连到机子上装vpn的
[root@localhost etc]# service pptpd restart
Shutting down pptpd:                                       [FAILED]
Starting pptpd:                                            [FAILED]
Warning: a pptpd restart does not terminate existing
connections, so new connections may be assigned the same IP
address and cause unexpected results.  Use restart-kill to
destroy existing connections during a restart.