I needed to update air to 3.6 for use with Flash Builder. I overlayed the newest Air SDK with a copy of Flex 4.6.0. Now, when I try to create any new Flex projects, none of the core swc files will load. For example this error: "unable to load SWC ._asc-support.swc"
Why can't it load these files? They are listed in the project explorer as expected.
UPDATE:
The solution to this is here:
http://forums.adobe.com/thread/1166179?tstart=0
I was using the wrong SDK download. Air for Flex is a smaller link under the large download buttons on the SDK download page.