input to audacity from Mac Mini through Firestudio

We installed Audacity on our church Mac Mini to record sermons. We have a Presonus Studio Live 16.4.2 board. On the input setting Audacity sees Presonus Firestudio, but when someone speaks into the microphone, there is no signal coming into the program, hence a blank recording. We also have the preloaded Presonus recording software Capture on the Mac mini, (which is too complicated a program, which is why we are trying audacity) and it also sees the presonus firestudio input, but the capture works-it records the signal from the microphone. Any ideas how to solve this problem.

Please see the pink panel at the top of the page and give us the Audacity version and Mac OS X version (all three numbers for both).

Select the Firestudio as input device in /Applications/Utilities/Audio MIDI Setup then set it up so that the “Format” has the same sample rate as the project rate bottom left of Audacity and has the same number of recording channels that you chose in Audacity. Then restart Audacity.