The answer explains why you may be having problems connecting by ssh to your VPS
This article applies to Virtual Private Server accounts.
If you try to use the SSH Connection function within Virtuozzo, you may be presented with an error.
To resolve this, please login using a suitable SSH client such as PuTTY.
Once logged in, open the file /etc/ssh/sshd_config and edit the line:
#PasswordAuthentication yes
To
PasswordAuthentication yes
If the # is already removed, please make sure it is not set to ‘no’.
Finally, you must restart sshd by running:
/etc/init.d/sshd restart