I have this same issue. I cannot access the freeview guide. I note during setup that it says it will ask for the postcode, but the only option to include a postcode is within My Account settings and not in the SlingBox setup. I also note that the favourites list on the iPad Mini (using iPad player) which have been generated automatically are incorrect. For example, the favourite "5" for BBC HD, has the correct icon for BBC HD, but is in fact switches to Channel 5, not BBC HD.
Please advise how correct both issues?