I have NET IPTV on my Samsung Smart Tv Model UN55KU6290FXZA I put in the Mac Address supplied by the app then go to add list. On the first list I enter the URL http://their name and numbers given to me click on update. It never ask for my username or password ?? I power off the Tv and restart the app and nothing if I click on list at the bottom right select 1 out of the 1-4 option it says loading but nothing happens. What am I doing wrong ?