Are "Data Type Renderers" suported in ActionScript projects?

Hi,

I am trying to set up Data Type renderers with my AS3 project. It does not seams to work.

I tried refering class as org.mvcexpress.mvc.Proxy and org.mvcexpress.mvc::Proxy but nothing helps.

I folowed this totarial : http://blogs.jetbrains.com/idea/2008/04/type-renderers/

Is it suported?