Go to the portal and remove your MAC address. Just delete it, don't make it zeros, save this. Log back in and make sure it's gone, it will probably look like this 00:00:00:00:00:00 that's ok.
Configure xtream-codes iptv.
Make sure your set up is similar to
this.
Website=http://s1.iptv66.tv
and enter your donation number in both Username + Password
Leave the Port at 80.
With this method, you will not have an EPG guide. There are alternatives though.
If everything works, fire up the xtream-codes iptv and you should see
this. Just tried mine again, works fine. Channels load, account status shows active and playback is fine.