No Extruder Output when printing (works manually) (4 replies)

I'm starting up a Prusa Mendel I bought as a kit. The Sanguinololu board was preloaded when I got it. Each axis works correctly, the extruder works when clicking on the "Extrude" and "Reverse" buttons on the Pronterface graphic interface. However, when I load a file, the X,Y and Z axis work, the head traces out each layer correctly, but the extruder does nothing. The temperature reports at 205 or so, it will extrude melted plastic when the extruder is commanded manually, but the extruder motor doesn't do anything. What should I check? I assume there's a setting wrong in my PC software.