a second aport,
you can press the sequencer button and if you can see, in the bottom of each number of the track there is an arrow under number1, that means that you are using this track in this moment, if oyu use the arrows key right key, you will see that the arrow is moving to other track, and you can play, change parameters, etc, in this track, it depends which trak you select, and you will realize that the #10 track is the drums track,i think that this track is special for drums in order to generate the midi sample (must be the drums be set in this track)
with this you are able to select any instrument in any track and start to recording each one.