Including another composite as a child

[naveendas]

I am having trouble trying to add an existing composite block as child. The information provided at http://www.sparxsystems.com/enterprise_architect_user_guide/10/modeling_basics/compositeelements.html does'nt seem to help as I donot see New Diagram | Select Composite Diagram in the context menu. Could somebody please advice

I see that there is an option to add a diagram as a hyperlink by dragging and dropping it, however what I am looking at is to create a hyperlink to the component