So im in the processing of mapping my apc40 to traktor. Its on smart mode and I have basic functions mapped, but Im having trouble as far as LED goes. The simple function of Play/Pause button, for example, lights up on and off when I activate it with the mouse. But once I physically press the button, the light shuts off, and there is no feedback unless I hold the button, or use my mouse again. Ive researched the DJTT articles on mapping and even watched Shiftee at dubspot, but im still finding difficulty in solving this issue. And for further information, I am extremely new to this mapping thing, so please bear with me. Any advice much appreciated! Thanks!