Edirol UA-4FX External Sound System "midi keyboard garageband" Questions

...midi keyboard plugged in all as before. I have plugged in a mic and I can see the signal ending up in Garageband, but there are no lights on the Edirol and the midi keyboard isn't picked up at ...

...MIDI keyboard and a microphone. I can play the sounds available in Garageband but not the sounds of the Roland, and there's no sign at all coming from the microphone (although the Tascam shows some ...