I go to log into my sling box account and connect to it and I got a message that my slingbox is being used by someone else but I know it's not. Then I can't connect due to proxy settings. Anyone else ever get this message?
Often. And it isn't someone else, it's you. For some reason when you disconnect from your box it is not completing the full disconnection procedure. So next time you connect the Slingbox thinks you are still connected and sends the message,