Make sure you go into IPTV Stalker and do an initial load of the channels there by selecting NFPS, then All. This sets the cache which the program calls the links from.
Still not much luck as restarting the m3u via the config options. I am only getting a very small numbers of the channels to load. After viewing the streams for a few minutes via the the Amazon Fire TV, the few PVR streams that seem to work drops. Any other suggestions?