I have the same problem. Did you find a solution? Most things are working okay, but the jog wheel doesn't move the position bar, and the master fader doesn't control the master in Cubase. Also the transport buttons on the Keylab look like they ought to light up depending on what function they're performing. They operate play, stop, record, loop fine, but the buttons don't light up or switch off accordingly. Also the metronome button doesn't control the metronome in Cubase. I'm pretty sure the buttons did light up okay until I installed the latest Steinberg Yamaha USB driver, which solved some other problems, but may be behind the lighting up problem.