MIDI not detecting but has worked before

My MIDI Device is not connecting. I’ve used it before on the same computer but it doesn’t detect my device randomly. Don’t know if it’s a problem with your software or the computer. But I have used the MIDI controller before so there isn’t problems regarding if the MIDI device itself not working. Also I’ve tried moving the knobs and spinners and it’s not detecting it either. Thank you.

Hi, do you have a Mac, Windows or IPad ?

For Windows, check if the AISO driver for your device is up to date.
First start Djay Pro ( or Djay 2 ) and then startup your MIDI device.