MaxPunkte requires a recent driver for the USB-chip in you FLYMASTER installed on your computer. Old drivers may result in errors like this:

Another error message may be "FT_GetComPortNumber not found". In this case please get the newest driver from the manufacturer of this chip: Presently (Nov. 2011) I use this release on my Windows Vista PC:  2.08.14 WHQL Certified Available as setup executable

If you install other USB devices which use the same chips from ftdi it may happen, that with thes device an old driver may be installed. Then please reinstall the most recent driver. The version number of the ftd2dxx.dll should be or higher.