Will not let me update my mac address via the web interface says cannot update mac address an error occured havnt been able to use the service since i purchased this is not cool

I just bought a iptv66 donation and now ineed help setting it up is it possible to watch iptv on my roku threw some sort of streaming or plex i heard it was please help im trying to use this addon to stream to my roku so i can watch on my tv...