I'm having problems establishing communications between my Zumo 350 and notebook running Mapsource. When I try do download a route it can't find the GPS. Mapsource has 2009 non-NT version of CNNA. I have no problem communicating on another computer running Basecamp. I can see the Zumo in Explorer and Webupdater on the netbook. I have a feeling the USB driver is incorrect. I updated it off the Garmin website and it loaded it in another directory other than the one containing Mapsource. Can somebody running Mapsource and the Zumo 350 tell be what version USB driver you're using and where in the directory it's located?