Everytime i turn on my Freeview box it says it will update itself but when i let it, it just 'updates' for a long time and does nothing. If i wait til its finished, when i turn it back on another day the same thing just happens again. When it 1st comes on it says it should be left on standby overnight, so i tried that for a few nights and it still doesnt update. Whats wrong with it?