GSS 3.1 Remote Installer not adding PC to specific group

We've begun using GSS 3.1 at our institution and when using the Remote Agent Installer it won't add a newly registered computer to a specific group in the Console.  The agent deploys fine, and adds the PC to the default "All Computers" group.  We've tried specifying the group folder we want them to join in various formats, but none seem to work.  We've tried:  "All Computers\TestFolder",  "TestFolder",  "\TestFolder", etc. etc. and nothing seems to do the trick.  Any suggestions?  Niether the written nor video documentation for 3.1 gives examples of how to structure this...