SSH Trouble

Here i am working as Linux administer trainee. during my training i got some trouble and got the solutions by digging for it a long time.

i got a problem with the connection to SSH virtual machine. when I'm trying to connect my vz machine through
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#ssh root@x.x.x.x (x.x.x.x is my ip)

it shows

ssh: connect to host x.x.x.x port 22: Connection refused

i first checked the sshd is working or not by,

#pgrep sshd

if it shows any number (pid) then it is working;

then check the network by pinging to the ip;

if everything is fine then go to the another mechine n get into your vz then re-install

#yum install openssh-server.x86_64 openssh-clients.x86_64 libssh2-devel.x86_64

then connect through your machine it will work..!