Hi,
a Plugin must be created with Flash CS3 or with the Commandline Flash compiler
mxmlc,
to use the krpano interface the "krpano_as3_interface.as" must be imported direct in the Actionscript3 source code (.as)
have a look here:
AS3 Interface / Plugin Development
have also a look at the plugin souces (the
.as files) in the "plugin-sources" subfolders in the download package,
regards,
Klaus