... work very well together. Harmor can see all 4 MIDI ports and all 4 are usable.
BUT:- if I open FLStudio (ver 10.0.9) or MIDI OX, the MIDI-In communication light
dies, and the Midisport's 4 ports are not visible to either application. This same
phenomenon occurs with another standalone VST named Spicy Guitar. Harmor
standalone plays like a dream - the other 3 applications just have the effect of
preventing Midisport from working!

Windows Device Manager says that the Midisport 4x4 Anniversary is working properly... driver
Win 7 SP1 64bit
6-core AMD Phenom II
6Gb memory