Arduion - Flash AS3 - rx blinks, but board does nothing

Projects Interfacing w/ Software on the Computer
1

Hi.

I'm attempting to connect to Arduino with Flash AS3.

I have used this blog post by Mike Chambers Getting Started with Flash and Arduino, and it more or less works fine on Mac OSX 10.5.8.
To get it working, I have to:

  • run the flash file
  • THEN I have to open the Serial Monitor in Arduino

If I don't open the serial monitor, the RX light blinks when ever I send a command from Flash to the Arduino, but the Arduino doesn't actually do anything I've programed it to do.

But, when I try to do this on Windows 7 (64 bit), it doesn't work.
I can't run the flash .exe file and then open up the Serial Monitor, because Arduino (obviously) keeps telling me that the commport is in use.

Has anyone else come across this problem and managed to find a way around it? I've seen that other people have mentioned having it, but they seemed to figure it out (Getting Started with Flash and Arduino).

Any help appreciated.
Martin