I've searched the forums but couldn't find the solution to probably a very easy problem.

I printed the active cooling duct from thingiverse, wired up a 40mm 24v fan to the "EXTRA" power that is labeled on the PCB of my Flashforge Creator Pro.

When I set the parameters in Simplify3D for cooling (ie. Layer 1 = 0%, Layer 2 = 100%), the fan does not automatically turn on at layer 2.

However, if I go into the menu options and "Set Cooling Fan" on, it turns on without any issues. Thus the wiring is correct, I just can't get it to automatically turn on during the print.

What am I doing wrong? It has to be something obvious that I'm missing.