Cisco 7841 Error License Issue... ?

[Translator]

Hello!

I apologize in advance if I got the wrong category, this is the first time I've come here. I'll explain my problem to you and really hope you can help me!

I acquired a Cisco 7841, installed on it the multi platform firmware 11.3.6, so I have good access to the web interface that allows me to configure my Cisco. So I bought an S I P line at OVH and returned as I could the connection settings.

On the phone I have a message that appears "provide the migration license, administrator contact ".
I dry a bit there, do I have to buy any license on the Cisco site? 

Thank you for your answers!