Hi,
Make sure you can ping your hosts from the prime client, using the hostnames
vm07.nubav.thinkon.net
vm08.nubav.thinkon.net
vm09.nubav.thinkon.net
vm10.nubav.thinkon.net
Right now your results indicate that your prime client cannot resolve these hostnames.
You may need to add the hostnames to your prime client's hosts file.
When you complete the instructions to set up passwordless SSH, make sure you are logging into the system using its hostname.
Afterward, test passwordless SSH by opening a cygwin window from the prime client and running
ssh -l root ESXiSystem
where ESXiSystem is the system hostname.
If passwordless SSH has been installed correctly, you should be taken directly to the command line of the remote host.