My iCN530 seems to think I want measurments in km and that I speak fluent German. What do I have to do convince the thing I am English, that I only speak English, we measure distance and speed in miles and my wagon wont fit up public footpaths or bridal ways. I have re-setting preferences, re-setting the unit, turned the battery off and back on, even totally drained the battery. None of this worked. All was well untill the units first birhday. Help please.