I have Logic Express 7.0 which was purchased several years ago, but just opened last week. I'd like to crank out a project on this software, but can't even get through the tutorial. The computer is a G4 mirror door dual 1.25, the interface is PreSonus Firebox, and the keyboard is a Roland A-90ex. In the tutorial MIDI Recording section (p47) I'm supposed to be able to play a solo on one of the tracks, but it doesn't work- no sound, no data recorded. Checking the Environment window, click & ports, everything looks correct, but the MIDI doesn't get past the switch. When I play the A90 keyboard, the screen keyboard shows the notes being played and the numeric values show up in the monitor object, but no sound. Clicking on the switch changes the white lines to black in a number of ways, but still no sound. What am I missing?