There is no need to change the time zone, the EPG should still be working correctly. Did you change the timeout settings? I think it is set to 60 per default. When I had problems, the timeout happened immediately without any delay. I changed it down to 15 and the loading process took some time, but started working.
Also the EPG is not up to date at the moment, but that is something you can work on fixing once you see channels.
Also the EPG is not up to date at the moment, but that is something you can work on fixing once you see channels.