You are using the Korg in the Program mode. In this mode, it only responds to one channel (the Global channel).

Switch to SEQ (or Sequencer) mode. Each track in the 16-track sequencer will be set to a different MIDI channel by default. If it is not, check the MIDI channel on pages 3 and 4.

Set the Local Control setting in the Global mode on page one to "OFF" and Cakewalk's MIDI Echo (in the Project Options MIDI input box) to 'Auto'. With this setting, you will not have to change anything, including the global channel on the O1/W. Set up the Instruments option on Cakewalk to be the Korg O1/W on channels 1 through 16 of your MIDI out port, and start sequencing!

Remember to select a new MIDI channel for every new track!

Steve Martin
Ward Music