Import personal class from external folder

hi everyone,

I have a project (let’s call it project A), and i want to import some class in it from another location (folder B, outside of folder A) :

folder A

folder B
–folder com

In the project property (of project A), i add folder B as a new source folder and as a new path (don’t know which one is supposed to work)
and from main.fla :
import com.*;
but it doesn’t it

any idea ?
thanks in advance