flash ne permet d'executer des exe, seulement s'ils sont dans un dossier fscommand qui se trouve dans le meme dossier que l application.
"The exec command can contain only the characters A-Z, a-z, 0-9, period (.), and underscore (_). The exec command runs in the subdirectory fscommand only. In other words, if you use the exec command to call an application, the application must reside in a subdirectory named fscommand. The exec command works only from within a Flash projector file."