I am a father of a few great children, in a painful divorce situation.
My children spend every second week with me, with the exception of my oldest daughter, aged 13.5, who has never visited, phoned, or written for over a year.

After begging my ex to allow my daughter to see a therapist, she began weekly visits some 6 months ago.
The therapist has written to me on a few occasions stating that:

• Daughter (D) is not open to her, does not express her feelings or reservations, does not answer questions, and is not able to communicate her worries or wishes to her therapist.

• The situation is making my D sad, but as therapist, she cannot say what is causing this.

• That we all have the same goal, that being to repair the contact between D and myself. Yet, whilst I have shown patience and willingness to find solutions by slowly restoring contact, the therapist still has no proposition concerning the rebuilding of visitations.

• D arrives to sessions accompanied with her mom, who waits for her to accompany her back to her home. I am concerned that this protective approach is not conducive to allowing any therapy to have effect.

Whilst my D may require help, it is also evident that the therapist she currently visits has not succeeded in her mission.

How many sessions and months should go by without considering finding a suitable therapist who can get my D to converse?
Is it time to change therapist?