K, I have a keycard reader (func_button) and its suppoee to close 2 doors, and load the next map. The master is keycard_m. I put a item_security, and set the target to keycard (which is a MultiManager). In the MM, there is a ambience_generic that plays gunpickup2 and also targets the button's master keycard_m. The prob is HL says master is null or not master. WHHYYYY!!!?!?!! I read that null means "nothing".