Provider was unable to provide a security token

I have a VM machine set up that is not part of any domain.  I've followed the service bus tutorial to install and configure the service but initially.  The sample program is generating the "token provider was unable to provide a security token" on the line below:

if (namespaceManager.QueueExists(QueueName))

I'm running everything from VM, and under the administrator mode.  Can I run the Service Bus under workgroup?