I understand that you are not able to get your Slingbox up and running, since it shows this error message. Besides, the the network and power lights blink.
The error message is related to the Internet Viewing feature (not enabled). You will need to run the Setup Assistant for Internet Viewing.
Now, you stated that the lights are blinking. It is mandatory to get solid lights in order to locate the Slingbox on your network and set it up for Internet Viewing.
The following links will provide you with the steps to follow.
Once you get solid lights, you must run the Setup Assistant for Internet Viewing.
Make sure to follow these indications and let us know how it works for you.