Sounds like your therapist is wise and trying to be supportive of your system as a whole. One of the goals of therapy is communication and cooperation, I guess really, that applies to just about any therapy, but it is very important with DID.

When my alters are at odds with each other, and me, for whatever has triggered the switching, it must be communicated in a way the outsider will understand, in a way the personality(s) will comprehend. These personalities are created for a purpose, that purpose is to survive. If the alter is not receeding, then trust your system to know why, perhaps it's something in the external enviroment which is triggering the alter to feel a need to stay external, communication at what ever level you feel you can, may help the one(s) out feel safe to come in, or visa versa..

I do hope the best outcome for you, all of you(s)...

Evangelista