F-15C only few buttons working

Installed the mod and installed the F-15C with FC3 package with the mod loader. 
4 Buttons seem to work, The CAS pitch, yaw and roll as well as the ECM button and the ejection seat.
No other switch or knob seems to be clickable. and In videos I always see Youtubers Press all sorts of things.
maybe Im just stupid but can anyone help me with this?