(.exe export) problem with "OpenDialog" !

Hello.
(I'm just trying 3DFA before a purchase, and i'm new in ActionScript.)

I 'm trying to make a simple "mp3 player" with just 3 buttons ( Load music | Play Music| Stop music).

I use this script for the Load button "Application.fileOpenDialog("mp3");"

In the 3DFA editor, when i click on the Load button, there's no problem, the Open Dialog works fine !

But when i export as .exe file for a test, the load button seems not working, the Open Files dialog don't appear !

Where is the problem ?

thank U for helping.