USB-Driver requirements
The MaxPunkte installation package doesn't include any drivers for USB-devices.
For generic Garmin USB please install driver from: http://www8.garmin.com/support/download_details.jsp?id=591
Flytec 6030 or Braeuniger Compeo+ require the Prolific USB-serial adapter driver, which can be found at www.flytec.ch/usb_serial_driver.htm
If you use a USB-to-serial adapter you must install the appropriate driver. Very common USB Chip Manufacturers are Prolific and FTDI-Chip.