Upgrade 4.0 AIR error namespace

I'm using FlashDevelop for compile and i upgraded the AIR SDK with compiler to 4.0, i edit the name space with <application xmlns="http://ns.adobe.com/air/application/4.0"> and compiler option with -swf-version=23 whereaver when i go to compile tu iOS i have the error:

invalid application descriptor: Unknown namespace: http://ns.adobe.com/air/application/4.0

how can i fix?