Samsung UE40F6670 not recognised in servo console

Hi all,
I'm very much a novice with all this but would very much like to achieve the following Macbook pro >>> Serviio >>> Samsung UE40F6670 in order to stream movies.
Two days ago I installed Serviio for the first time and almost instantly I was watching HD movies on my tv through it, very impressive!
However later that day I looked again for serviio as a "source" on the tv menu and it was there but with a question mark instead of the usual yellow Serviio logo, not only this but on the serviio console it now does not recognise my TV.
I'm sure there must be an easy fix somewhere as it was already working to start with and i didnt change any settings between then and now.
As I said i'm a complete novice to this sort of networking so a simple step by step solution would be massively appreciated.
Thank you
Tom
I'm very much a novice with all this but would very much like to achieve the following Macbook pro >>> Serviio >>> Samsung UE40F6670 in order to stream movies.
Two days ago I installed Serviio for the first time and almost instantly I was watching HD movies on my tv through it, very impressive!
However later that day I looked again for serviio as a "source" on the tv menu and it was there but with a question mark instead of the usual yellow Serviio logo, not only this but on the serviio console it now does not recognise my TV.
I'm sure there must be an easy fix somewhere as it was already working to start with and i didnt change any settings between then and now.
As I said i'm a complete novice to this sort of networking so a simple step by step solution would be massively appreciated.
Thank you
Tom