I made a project with Flash Builder 4 with default SDK... It can be run in Flash Player version 10.0.45.2
But there is a problem: If client Flash Player is older than it (like 10.0.2 or 9 or less), there is no message and just client can see a solid page and nothing more.
How can I fix that? How can I give the client a message to download a last version of Flash Player? or how can I check if the client FP is older, download the last version automatically?
You should be able to set that in the HTML wrapper.
Project Properties > Flex Compiler > Adobe Flash Player options, Use a specific version
Jason San Jose
Software Engineer, Flash Builder