ActionScript 3.0 :: Reference Error While Playing With Shared Libraries

1. I have a main app. It has a TweenLite project added as library. The linkage type is "Merged into code". All the classes including "TweenPlugin" are checked. If I check somewhere in code

ActionScript Code:
var obj:Object = getDefinitionByName("gs.plugins::TweenPlugin");

and then watch the object, it gives me: obj = gs.plugins.TweenPlugin$(@2edfbc1), which is pretty logical and is how it should be.

2. I have a module project, which has TweenLite project added as a library with linkage type checked to "External". I simply make a release build of this module.

3. In main app I load to released module manually (not through Flex module mechanisms), just with Loader class. Not really more complex than this:
ActionScript Code:

_loader = new Loader();
_loader.addEventListener(IOErrorEvent.IO_ERROR,onLoadingError);
_loader.addEventListener(ProgressEvent.PROGRESS,onLoadingProgress);
_loader.addEventListener(Event.COMPLETE,onLoadingComplete);
try
{
_loader.load(new URLRequest("some.swf"));

4. In the module there is TweenPlugin class used somehow in the code. Pretty natural thing is that class definitions are inherited from the application domain of a loader to an application domain of a loaded content. So the TweenPlugin class should be available.

However I get the error:

Quote:

ReferenceError: Error #1065: Variable gs.plugins::TweenPlugin is not defined.