AST Gateway Manager Server not available
I have installed the latest AST (new install, not an upgrade) without any issues. The Gateway Manager, however, is unable to connect to the server. The ADR Server URL was pre-populated and is https://adr.apple.com/services/ws/capture. After entering in my information and clicking save, the Authentication Status goes from Authenticating to Server Not Available, and I get a giant red bar across the screen saying ADR Server Not Available.
The computer is running Mountain Lion Server with all of the latest patches. The machine is online. I can browse to any website I want. I can't figure out why it can't contact the ADR Server. Does anyone have any ideas?
Apple Service Toolkit-OTHER, OS X Server