Same story, after upgrading to Jarvis trouble with Stalker. I think I am using the right server address, etc. that is the only thing I have changed. The Stalker logo changed so I think am using the new Stalker Client. I can get the channels and they play, but now I am getting 'Authorization Lost, re-authorizing', then 'Re-authorized', over and over and over every 10 secs or so. Even when I am not watching IPTV. Any suggestions?

You might have another PVR Client that is enabled, or somewhere else, you are running a client that is using your MAC and "device_id", so the server is trying to do a re-connection. If you are sure you aren't running something else, an IPTV Reset may help, after you do a data clear on the TV settings page.

Clearing my data did the trick for me.