First principles of troubleshooting...... CHECK YOUR CABLES. Try a different MIDI cable just to be sure. No sound? Secondly, connect a different keyboard, module, drum machine, anything you have, just to see if Sonor is actually sending the MIDI. No sound? Then replace the cable again. Still no sound?

You HAVE played the Technics' keyboard and got it to sound, haven't you? If no sound, check the audio cables, mixer and speaker (or are you listening to built-in speakers?

After all that, now try and find your Technics' manual, and look up if there is a MIDI 'Receive' page somewhere and check that that is 'ON'.

Can't help a whole lot past that point (I'm a Rolander!), but those are the first things to check when ANYTHING goes wrong, before you spend a LOT of wasted time chasing ghosts.....