We have recently moved to a new job site.?

We have recently moved to a new location. We use our Mac book pro to stream to our new Apple tv. It worked flawlessly prior to the move. And worked just fine the first two weeks. Now the Mac book cannot find the Apple tv in search. I tried to relog in back into ITunes, with the Apple tv. It will not accept my password. I have shut down everything & registered my wifi information again to my MacBook & Apple tv. The only thing that shows on my Aplle tv is my wifi information. No iTunes from my MacBook