Hi every one... somebody can help me please.. I was try to pu my password and user name on my MAG254 but always shows error, I disconnected my box yesterday and today when I try turn on I got this message: "please contact your provider to register this device!"I got from Ebay. Thank you

Hi Everyone, I am new I got my box from ebay june last year everything works fine up today, I turned my box on I received the message to put my user and password I did but not go through shows error.I will appreciate if some buddy can help me. Thank you