The Garmin support website (.../download_details.jsp?id=4435), says "BaseCamp will recognize all MapSource products except BlueChart." Both MapSource and BaseCamp have been successfully installed on my Windows computer. However, BaseCamp does NOT recognize my Garmin MapSource - United States Topo (comparable to 1:100K USGS paper maps). I purchased version 3.02 of MapSource, though I've updated the s/w to version 6.16.3. I have other MapSource maps that ARE recognized by the BaseCamp s/w. Can you help me?