Configuring service encapsulation

Hi all,

I'm trying to set up a configuration for mule that does not appear to be trivial. I've gone through all the messaging style descriptions and tutorials and still haven't figured it out. Basically what I want is to get some "service encapsulation" that I'm not getting.

I want to call a number of services using multicast routing and then to have each of them call a number of other services in a chaining-router and then that the resulting message of those chains are returned asynchronously to the reply-to address. But regardless of what I do, the service that is called by the multicasting-router always returns the asynch message when the *first* service in the chain returns, and not when the last one returns...

How can I call a series of services in chain so that the asynch message comes from the last service in the chain?

Thanks!
João