flash mx and flash mx 2004 are pretty much non-compatible on some aspects of actionscript. Since 2004 relies mainly on the new as 2.0, while the latter uses as 1.0, flash mx cannot be depended on to handle as 2.0 correctly, even if the player can read it. Flash mx exports and formats things a little differently, therefore ruining the whole possibility of trying to incorporate as 2 into flash mx. In other words, no, you cant
