Flex builder cannot locate the required version of Flash Player. You might need to install Flash Player 9 or reinstall Flex Builder

Problem on Flex Builder with flash player on executing the MXML file...

Problem:
Flex builder cannot locate the required version of Flash Player. You might need to install Flash Player 9 or reinstall Flex Builder

solution:

solution to Flex builder cannot locate the required version of Flash Player. You might need to install Flash Player 9 or reinstall Flex Builder