how to get rig library to work

Hey guys! I just bought a new rig for flash and it comes with a bunch hands but I'm having trouble getting them to switch over. Whenever I change the hands in the symbol as soon as I exit out they'll be back to the deafult. I will admit I'm a little rusty with flash as I haven't been able to animate in awhile due to personal issues so i'm incredibly sorry if this is a super obvious anwser.