First, ensure that you are properly installed the USB programmer to a USB port in the back of the computer correctly. After you install the USB programmer and restart the computer, Windows should be able to properly detect and identify the USB programmer hardware. After this happens, the computer should prompt you for the location of the driver for the USB programmer. Insert the CD that was included with the USB programmer. Hit the browse button to select the location of the CD drive you have inserted the CD into. After doing this, the computer should continue with proper installation of the USB programmer driver. When using the Mapsource software, you can transfer area maps to the data card via the USB programmer. If you are not given the option to write to the USB programmer through the &Save to Device& window, then most likely you do not have a version of the Mapsource operating software that is compatible with the USB data programmer. You must be using at least Mapsource software version 3.05 to use the USB programmer with the Mapsource software. To download the most current version of the Mapsource software, click Here and follow the steps on the Garmin web page. After you have downloaded and installed the most current Mapsource software, you should see a change in the window of the &Save to Device& selection for the USB programmer.