import flash movieclip into flashbuilder

Hi i tried this tutorial http://www.codeandvisual.com/2009/how-to-import-movieclips-into-a-flas h-builder-actionscript-project/

but when i import flash movieclip into flashbuilder then it shows source attachment None after view swc which i import.

is there other way to import flash movieclips into flashbuilder???