Running AppleScript When Inserting a Blank CD

I want to automatically burn a cross-platform data CD with the same contents each time a blank disc is inserted, and eject it when done. To that end I created a very simple AppleScript that does just that: do shell script "/bin/bash -c 'hdiutil burn ~/Desktop/catalog.iso'" It works fine from the AppleScript editor. If I click "Run" with a blank CD inside, it burns the CD with the data from the .iso and ejects it upon completion. However, if I select "Run ~/Desktop/burn.scpt" as the default action when inserting a blank CD, nothing happens. I actually have to open the AppleScript editor and select "Run". How can I make it actually run the script?