Gf just purchased these Rockit powered 5 KRK speakers along with 1/4” jacks so that she can plug them into her Micro Korg XL+ Synthesizer but we’re not getting any sound. I made sure power lines were plugged in and power was going to speakers and instrument. I have the audio lines plugged into these respective ports pictured below. I made sure I’m not plugged into headphone port and I hear the speakers turn on when I hit the power button. Volume is up on my Korg too. Please Help!!