OK here is my issue:
I am trying to run a script remotely on a server.
I am an administrator on both boxes, firewall exceptions are in place, remote admin is e
This seems to indicate that you need to ensure you are a local admin on the remote machine (although admittedly this is for WMI specifically). According to this you can change a registry key to stop UAC applying to remote logons for administrators (search for LocalAccountTokenFilterPolicy). That shouldn't disable UAC just not filter the token if you use powershell/WMI remotely with an administrator account.