I will keep you and your family in my thoughts and prayers, but I have a feeling that Dick has bribed your daughter and she will want to stay w/her father. You see, I think a lot of what is going on is that he doesn't want you to not have to pay child support. He wants to even up the odds, i.e., he has one and you have one. Notice this, your son is living w/you (female) and your daughter is living w/him (male). Generally, it is the male child that wants to be w/his father. Games are in full swing and I do hope that I am very wrong about what I'm feeling.
Stay positive no matter what. You've been down this road before w/your son and it took him a while to see the light. So shall your daughter. Stand tall, hold your head up and know that you have done all that you can.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.