vim-cmd: Failed to login: Connection refused

Hi All , I have the following errors:

1.when I use all the vim-cmd, it show the error:

Failed to login: Connection refused

2. I can't login the management using vsphere client :
    vshpere client oculd not connect tp "IP" An unknown connection error occoured. ( The request failed because of connection failure . Unable to connect to the remote server))

I try restart service using : ./service.sh restart no use.

I try add back host IP to /etc/hosts. also no use.

Any one can help ??

I am using ESXi5