Good morning, I have the Komplete Kontrol S88 mkII Keyboard, the E2 key does not work, not only does it not sound, but it does not even emit the Midi Note signal. The software I use is Logic pro X. Playing the key with much greater force, however, it sounds. I imagine it is a question of the mechanical contacts of the key. I live in Monopoli in Puglia (ITALY). To which assistance center can I take it?