I bought online a refurb C240 this month. I use the same headphones that work with my Fuze and the same station ID for presets, but I am not able to hear any of the radio stations on the C240. I also am having problems adding content to the C240 and the computer will not recognize the external microcard either. Is any of this due to it being a refurb unit or is it probably user error? I really know what to do with my Fuze, but the same techniques are not working with the C240. HELP please. Thanks.