Do you dare to try this......some what Complicated?

I have a flash site with a menu with sub menu as well. Submenu has got five buttons using them I am playing the movie in a container_mc(blank movie clip). Submenu buttons calls a swf from out side that swf plays nicely. But the problem is that on that swf I have few buttons connected to other swf when I press those btn , movie playing in container stops as obviously it has to be but the called swf doesn’t appears. Please suggest me how to call that movie clip?
Main menu btn----Submenubtn----btn