Log onto your code at the service website and delete the MAC, leave it blank or all zeros. Perform a reset there at the website and then power on he buzz and try connecting thru that portal.
Take notice of what type of error you then get. Is it a message of some sort about not connecting or is it that same loading circle ?
Next is to log back on and leave the MAC blank (or all zeros). At this point you have the option to select a Playlist. Open that option and select 'Generic m3u Plus with Options'
Now either copy that URL that shows up or open it and retrieve the Hard copy of the Playlist.
http://iptvtalk.net/showthread.php?27179-How-to-get-a-Rocket-Playlist
For this test, I would simply copy the Playlist URL and paste that into a notepad doc on your desktop.
You then want that Playlist URL to be Pasted or typed into the M3U Playlist slot (which is found in Server Settings/Setup menus). If this connects with this method then I don't know what that would tell us, but it is part of trying to figure out the issue, and now you would have TV again if it connects correctly.
It's a long URL to being typing in and you can elect to type it in or use Total Comander to Paste it in the slot.
Using the Comander editor, you can paste that URL and also the EPG URL, assuming this does work to connect to your server, otherwise not much use in pasting the EPG URL in there.
http://iptvtalk.net/showthread.php?42733-BuzzTV-XR4000-XRS4000-copy-and-paste-with-Total-Commander
Or as said, simply type that full URL into the Playlist URL slot and try and connect before worry about an EPG URL