After rebooting my machine, I could never get the machines to show up again, always stating that
The configuration file (C:\Documents and Settings\NetworkService\My
Documents\SQL\Reporting Services.vmc) referenced by the configuration link
“C:\Documents and Settings\All Users\Application Data\Microsoft\Virtual
Server\Virtual Machines\Reporting Services.lnk” could not be found.
I would then have to go in and delete the file “C:\Documents and Settings\All Users\Application Data\Microsoft\Virtual
Server\Virtual Machines\Reporting Services.lnk” and reassociate the machine.
I resolved this problem by putting the machines in the default folder (defined in the Default Paths in the Virtual Server configuration page) instead of my personal folder in ‘My Documents’