I would like to use my home Humax box in my caravan, I have 100% signal strength and 60% picture quality (according to my twosignal bars showing on screen) however when I try to search for channels the box tells me my post code is not recognised and I donn't have a signal. I have used the box in France before with no problems so anyone know why? I am using a Multimo and have try resetting to the local poste code but it doesn't recognise that either. All replys most welcome thanks for looking