Wrong 3d transformation?

I’m playing around with Flash CS4 trial…

…tried to ‘compose’ a 3d Box by putting 6 MovieClips as the side elements of the box in one clip which represents the whole box. (only using the Flash Tools, no Actionscript)
Within the BoxClip (after doubleclick on the BoxClip on stage), all sides look right, each side is positioned with the correct angles and coordinates.
Outside the BoxClip, back on root stage, the box sides are not parallel anymore, the angles are not 90 degrees, there is no ‘box’ actually.

So i guess, one of the problems is the 3D Center point of the objects which is absolute
to one point in coordinate space. The other problem is the faulty ‘3D’ display in Flash, that is, changing from inside to ouside a clip changes the view also.

So far, the Flash GUI seems quite useless for doing some ‘3D’.

Any ideas, how to improve the workflow?

Keith