I'm having issues getting a workstation to register with the server.
The workstation is running Windows XP SP2 (all recent patches) 64-bit
When I run "zac reg ...." to manually register the workstation I get an
error saying

"Unable to register with the server at https://server.
Service Error. code: -21, message: Could not determine device type from
tag: unsupported"

The documentation does just say Windows XP and doesn't mention the
64-bit version. It does says it supports Windows Vista in both 32 and
64 bits versions. So it may just be that WinXP 64-bit is not
supported...any information/ideas/suggestions to get the workstation to
register would be greatly appreciated.