You can tell her that I say she is an idiot. It is T's like this that fill the mental hospitals with those with DID and work on the problems alters have instead of recognizing DID.
It took me about 3 months to find a new therapist as well after my first, who was wonderful, and who's focus was trauma and dissociative disorders, but had never treated anyone with DID. She was delighted to finally have a DID patient, but she was scared. She was trying to keep up with me in reading, but was overwhelmed. And the poor thing did not know what to do when I would have pseudoseizures at the slightest sound - even her voice!

We both thought it was better for me to find someone with more expertise in DID, which she did try and help me do. I was lucky that someone had just moved to my area who's focus was DID and PTSD or I would have been out of luck. Those months were good for me. I kept reading and working on things myself.
"Coping with Trauma-Related Dissociation" (2 of the authors of this book wrote the haunted self, but this book is an easy to read workbook meant for patient use.)
http://www.amazon.com/dp/039370646X/?tag=bfftlbr-201. One option is that perhaps this T you have will accept this workbook and do it with you. Most likely she is out of her comfort zone, and rather than learning about DID, she chooses to ignore it. It is best to work with someone when doing the workbook, or the point often gets missed.
2. If you can work on integration and work with alters on your own during this time, perhaps she can work with the trauma issues. DID simply put has 2 problems and they can be worked on quite separately. Integration - see my thread on supportive integration. YOU do this by yourself. My T gives me direction, but I do hours and hours of work each week at home without him.
dissociative-identity/topic100124.html 3. PTSD - Trauma issues. This is the comorbid part that is helpful to work on, because besides integration, DID is much like PTSD, but of course with far more than one trauma to deal with. Your T sounds like she is willing to work on this.
You can't fix stupid and you don't need a stupid T (my word for those T's that refuse to educate themselves with current knowledge - it does not mean they are really stupid). You don't need to work on comorbid disorders that will resolve themselves once DID is fixed. You need to work on your DID - heck it already takes about 5 years of therapy to fix DID, who wants to spend time on comorbid disorders. My list would be long, Psychopath, sociopath, suicidality, autistic, borderline, OCD, depression, anxiety, somatoform disorders, eating disorder, PTSD, and so on and so on.
Research on this topic:
http://www.ncbi.nlm.nih.gov/pubmed/21278542I cannot tell you what is best for you. Loosing your support is devastating, so I cannot suggest this either. Only you can weigh the issues and decide.
Have you read the ISSTD Treatment guidelines?
http://www.isst-d.org/jtd/GUIDELINES_REVISED2011.pdf