Forgot to turn TS on on your server

Here is the answer to your problem, and NO it does not concern walking to the locked serverroom and logging on at the console.

Brian Rutkowsky wrote a nice blog article about it:

http://blogs.technet.com/brad_rutkowski/archive/2006/10/18/hey-i-forgot-to-turn-on-rdp-on-my-server.aspx