Hello! I am working on a device that has only one MIDI out port, using the generic USB MIDI driver. This works fine with Windows XP and Mac OS-X. It does not work with Vista. Just for testing i have added a dummy MIDI In port to the USB descriptor. Now it can be used with Vista as well. But this cannot be a solution for me, as I do not want to see a non-existing MIDI-In Port in the device selection. Han anybody else experienced this problem? Does anybody know, if there is a solution for this driver bug? Regards, Gregor.