now extract flexsdk in your hard drive and paste playerglobal.swc in “frameworks\libs\player\11.0\”
Install Flash develop by double clicking its exe file,
Create new project,
Go to Project>Properties>Output>Platform. Change Target to Flash Player 11.0.
In Project>Properties>Compiler Options >advanced, change Additional Compiler Options to “-swf-version=13” (without quotes)
Go to Project>Properties>Output>Test Movie. Select Open document from dropdown list. Click Edit button and type “bin\index.html” (without quotes)
now edit bin\index.html and change wmode to “direct”. for more detail click this link.