ActiveX container of other ActiveX controls in BCB6


I'm struggling with ActiveX control, which is a main control in my
application and also a container for other ActiveX controls from the same
vendor (image editor and image editing tools). The main ActiveX control
properties can be edited using Properties item from the popup menu in any
development environment (BCB, VB, VC++). The next popup menu item called
Edit suppose to activate the main control (image editor) and let me
interactively edit child control (editing tools) properties. Unfortunately
this works under VC++ and VB but does nothing under BCB even in version 6

Any suggestions,