I have a zgemma h.s and have loaded the wooshbuild v6 image. Everything is good and I have created my own bouquets and assigned epg without any problems using echanneliser. My only problem is when i try to change from an IPTV channel to BBC Scotland it goes to a black screen. If i then go to BBC 2 HD then back to BBC1 scotland HD it comes on. Does anyone have any ideas on whats happening?