Hi! I have no real experience with recording and making music but got Logic Express 9 a while ago as well as the Focusrite Saffire PRO 14 audio interface. My problem is that I can not get Logic to source(?) the sound from whatever instrument that I have connected to the interface, instead it picks it up from the mic on my macbook pro. Could someone please give me a walkthrough of how to set it all up, that a novice can understand?