Activation group quandaries

Folks:

I need some clarification about service program & program behaviors with regard to activation groups.

I've got a service program that makes a call to an external ILE bound RPG program (prototyped, with EXTPGM). The RPG program is compiled with activation group *NEW. The service program is compiled with activation group *CALLER.

The service program is invoked from java via a remote program call (JT400).

This RPG program makes a procedure call into the same service program that calls it.

My questions are:

When the service program calls the external RPG program, should the activation group change from QILE to a new activation group?

When the external program calls back into the service program, will a new copy of the service program be loaded ... or will it call back into the original service program that invoked the external program?

Thanks!

david