showbox on sky

hi, a mate has used showbox for maybe a little more than a year with no prob until a few weeks ago, now it sits there with the circle thing going round and round, he is with sky and I use virgin. if I try mine at his house I get the same, he comes to mine and it works ok! tried the reinstall, clear cache etc but no luck. is sky blocking it or is it a router problem? anyone got any ideas on this?