2010 vision locks up homeport

I just loaded Homeport. When I install my 2008 G2 Vision card in my reader, no issues. When I install my 2010 G2 Vision card in my reader, Homeport locks up untill I remove the card. Both are micro SD cards in an adapter. I tried swapping adapters, no help. I tried downloading internal map data from my 4208 to my new card. This seemed to download ok, but can't even read THAT off the 2010 card. This appears to be a factory 2010 card, bought from a reputable dealer. Any Ideas how to make this useful? Bergymon