o.k. here is some more information on how I'm hooked up which may help you with my problem. I have a tascam us122 interface unit that I'm pluging in my midi and audio inputs. the usb cord going from that to the computer is how the signals are getting into the computer. I have my audio out from the tascam going to my sterio system for playback sound. I also have a rca plugged into my sound card going to my sterio system too. I can play, record audio through the tascam and playback, I can also plug my keyboard using midi in and outs to the tascam, record, and playback also. doing the same hook up with the midi cables to the drum machine only get the midi in signal on the tascam but the light for midi out is not on which means no out signal. hope this helps.