association between classes in diferent packages

Hi guys,

I'm modeling several objects and for the sake of encapsulations and
organization I created a root package (i.e. say myproj) and several
inner packages that contain the objects (i.e. objgroup1, objgroup2,
objgroup3).

When I create an association between to objects (say two classes, or a
use case and an actor) the association is created in my root package
(i.e. myproj) no in the package where the Diagram is located (i.e.
myproj.objgroup2). Furthermore the namespace box of the association only
shows my root package, so it's impossible to move it, not even by
drag&drop.

Am I doing something wrong or is it a bug?

Regards

Javier