What is the best way to set up my Tascam FW1884 mixer with the following. Roland SC8850 sound module midi in and out x 2, Roland PC-200 keyboard (with only a midi out port), Alesis SR16 drum machine with both midi in and out. I'm getting some midi sounds but either my FW1884 settings are incorrect or my Cubase SX2 settings are wrong. Any help much appreciated!!!!!!!