I've posted about this once before, and I changed my sshd_config file to allow all ciphers and macs as to avoid any issues with PLINK. I am now able to at least get a dialog if I want to accept the connection (security dialog with a thumbprint), and when I hit yes, it takes a minute and then fails to query afterwards.
I'm not sure what exactly is going on now, but this is causing me such a headache trying to take an image of a machine I don't have physical access to.