M-Audio Keystation 49 added, but no sound from any tracks now

As soon as I opened a song with my new keyboard plugged in, i heard sound. I even see lights going up and down on the left side. I went to Studio Setup and saw that the keyboard was already active. So far, so good!

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However, no sound came out from any other tracks, so I fiddled around with Studio Setup. Problem: now I hear no sound at all, not even from the keyboard!

What should I do to fix this issue>?

Problem solved! i can hear both Instrument tracks AND keyboard.

Now the only problem is that I can’t hear any of the Drum instruments. So still working on this…