Stage.quality in Air?

Hi, I’m trying to set low quality to my AIR app.
stage.quality = StageQuality.LOW;
But it doesn’t work. When I run it from Flash CS4 it’s still high quality. I’ve tried = “LOW” as well but there’s no difference there.

Do you guys know how to solve it?
Also, where are all AIR-settings in CS4? I know there’s an extension for CS3 but does it work for CS4?

Thanks in advance!