While firing up an Indigo service on a fresh VS2005 Feb CTP/Indigo Mar CTP install, I ran across an interesting exception from the service when I pinged it (with a GET request from a browser):
The tracking (workstation) service is not running
Description: An unhandled exception occurred during the execution
of the current web request. Please review the stack trace for more
information about the error and where it originated in the code.
Exception Details: System.Net.HttpListenerException: The tracking
(workstation) service is not running
Short story: make sure you’re running the "httplistener" service in the background–for some reason it doesn’t look like it gets started by default. "net start httplistener" usually does the trick.
(Mucho thanks to Kenny Wolf at MSFT for this tidbit.)