Log into your router and remove any port-forwards to the SlingBox typically port 5201.
What I like about the Amazon Fire stick is you don't cast to it - the Stick connects wireless directly to the Slingbox like your phone or tablet does.
We know it dances and sings, but what is it? This app has been removed from the Google Play Store.
I'm going to get two more Fire Sticks for my other home.
I don't know if they are charging for this app anymore or not.
The Chromecast works but one of mine suffers from dropped signals although a different one in an adjacent room closer to the router has no problems.