My Apple TV can no longer stream Netflix and the like...

Up To a couple of weeks ago, my ATV worked just fine! Also going through so many issues with Comcast and their equipment - after dealing with Comcast's tech crew I had to be put on 'suicide watch'! Those who giggled know exactly what I mean!!! However, once getting a reasonable WiFi signal throughout the house, my iPhone is receiving the signal as well as is my iPad, my 55" Vizio at the other end of the house, along with my PS3 - all functionOMG off this new WiFi signal - but my ATV can't stream Netflix or Hulu and many more listed on the ATV with the exception of YouTube! So my ATV will recognize the WiFi signal available, go through the motions of a successful setup, but can't stream... Anyone harbo any 'real' ideas or 'know' of what's really happening?! I've gone through the steps of "Restore" with no successful results. So now I'm at a loss! Oh and By the way, my input is a Ethernet connection from an Extender that's receiving a strong WiFi signal as it's only 18' from source. Of course it's been tested disconnected as a WiFi direct source too with worse results!