Hide buttons on load/run

I’ve been trying to build an application in flash whereby everything is held on a single frame (the different ‘screens’ held on seperate layers). My problem is that I want to hide some buttons and other things when the application loads but I can’t find anything on it. I have tried an onEnterFrame (AS3 addEventListener(Event.ENTER_FRAME) ) but that didn’t hide anything. I tried just having the button.visible = false but that didn’t seem to work either. It’s probably a stupid question, it’s very likely I’ve missed something in the properties window or something basic, I’m rather new to AS3 and have been working on this for a couple of days now without any success.