I just got a K49. It works great using only a 9V adapter (neg tip) and a MIDI-to-USB converter’s MIDI-IN plug inserted in the 5-pin jack. It kinda works using only the USB cable. That is, it gets power and the cursor works but the keyboard keys don’t work, they don’t make a sound (either they don’t generate MIDI commands or, if they do, they aren’t “read” by Cantabile; the Monitor option is gray). I downloaded the K49 driver but that didn’t help or hurt. Any idea what might be the problem? Is there an option in Cantabile or Windows 10 that I may need to set?