IPTV66 Nvidia Shield TV box

IPTV66 Help here!
Ok, 1: went to setting, then profiles, then clicked the New profile. I left the profile name the same. Then I put the Portal URL in: http://66.iptv66.tv Then I adjusted the screen resolution to 720x576. Then I put the Mac address in: 00:1A:78:xx:xx:xx Then I checked the Send Device ID box Then I went to save and restore settings and clicked save settings and profiles. Then I to where the settings pop up, click Profile, then the authentication pops up, put in my login and password, (the same #}. and that's when I get the error. Not sure how to find the server I'm using, but I have Comcast internet if that helps.
 
Some channels will be down from time-to-time. When you notice, post the channel number and channel in the Channel Issues subforum the next door down. Look in the stickies at the top for proper channel issue posting.

I just tried the FOX News channel and both video and audio are working here. Try reloading the channels.
 
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when that happen restart the box and start al over whit the password and user again it work for me 100%
make sure you dont have another device wuit the same mac and service connected. or it will keep cuming up password and user .