Here is the problem: Our preview functionality for development flash panels is broken.
If you update your flash file and publish the changes, the live version will actually update (after a delay).
We REALIZE that obviously prevents you from testing the change.. but you can always create a separate app for testing if that's in issue right now.
In the meantime, we ARE working on a resolution.
We appreciate your patience and are very sorry this has been going on so long.
Rhonda