Using GPO and a Roland keyboard RD-300SX, I am able to enter (in real time) music onto the Overture program; Overture then plays back the notation with whichever instruments I choose. However, when I enter the notes (playing the Roland) the sound I hear is a generic 'piano' sound - not the instrument I wish to hear for that particular track.

What can I do to get the Roland to trigger the correct instrument when I am recording onto Overture?

Thank you