Copy-Pasting between files NOT WORKING!

Hi, I don’t know if this is actually possible, but I’d like to know if I can draw a symbol or anything really in a seperate file and transfer it over to another. See, I kept my concept art(file #1) on a separate file on Flashmx, and another(File #2) focused on timing, etc. I want to transfer art from File 1 over to my File #2. It seems that I get a circle with a line through it, and it seems impossible. I even tried switching it to a symbol and doing the same thing, AND importing…but nothing =(

Please help! I would love an answer asap!