I understand that you are having some issues with your Slingbox Classic, since you are not able to get it up and running.
This error message is related to the Internet Viewing feature. It means that although your Slingbox is up and running at home, you still need to make some adjustments on the router settings in order to allow the remote connection.
Although you own the Slingbox Classic, the following link will provide you with the steps to follow in order to get this done.
Make sure to follow the indications and post back your results.