[AC Question]

So I have the Galaxy S5 Active edition and with it there is the extra active key on it, for awhile it was working fine and I could change it to be whatever I liked but somehow now it is stuck on Bell Push to Talk and whenever I go into settings to change it around the short and long press options are grayed out.

As a side note if anyone knows how to fix this do you also know if there is a way to assign the active key to turn on and off the flashlight?