I've purchased a new Firetv Stick 4K in December. Today I've installed smart iptv app, using the downloader app. Then I've uploaded a m3u file, that works on an older firetv stick. Well, all movies in this m3u file are listed properly, by I'm not able to select a movie in this list and to start it. I've tested it with 2 different remote controls, with the new one as well with remote control of my old firetv stick. I'm able to scroll through the whole list. But when I select a movie, nothing happens. What's wrong? Is it possible, the smart iptv is not working with the latest version of firetv stick? Any ideas what might be wrong?