I just bought this Analog Experience package today, and had no trouble installing the software on my Windows XP SP2 computer, but couldn't get the "plug and play" midi controller to work, period, with any program, in any form. However, my old Korg 25 midi controller will work in Sony Acid with the Arturia synth chosen as my softsynth... this is frustrating, and I will never buy another Aturia product if I can't get an answer to this problem.