Some users of Flash CS3 Professional are wondering "What happened to the components?". To clarify the situation, I propose to
read the article by comrade Justin Evert Church (Justin Everett-Church) .
Here is a summary in our language:
... If your FLA is aimed at exporting for ActionScript 1 or ActionScript 2, the component panel will automatically display the components with which you are already familiar with Flash 8 Professional.
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If you install the export file for ActionScript 3.0, you will see new components. Flash always shows you all the components that you can use according to your export settings.
In CS3 Flash, a number of lightweight, light-skincare components were added, written in AS 3.0. However, since they are built on the use of the new ActionScript virtual machine (AVM2), they can only work in SWF, which are exported for Flash Player 9 or higher and ActionScript 3.0. For those who have not started working with Flash CS3 Professional - these components are really cool! ...
Read full
here