[Flex] RSL - Error

==== Error Message after change to RSL Way ===
VerifyError: Error #1014: Class mx.effects::TweenEffect could not be found.

- Reason
framework.swc or some flex library does not load

- Solution : Change the loading library

- How
Click right button from project > Properties

> Flex Build Path > Library path > extend Flex 3.4
>Move up "framework.swc and datavisulaization.swc"