Have you spoken to the principal at her new school about the problem? Often they have had these problems before and may be able to direct you. Call the district, call the superintendent! There has to be some one to help.
I worked as a paraprofessional for Boulder Valley Schools and I can tell you this; schools don't like to lose their special needs kids. If they lose the kids; the paras lose their jobs and the school looses the extra help. When your daughter is sick, her para works in another area helping out. When the para is in the class with your daughter she or he helps other students and the school gets an extra adult in the room. This means more bodies on the playground, in classes, etc. Paraprofessionals are valuable (sometimes even a bargaining chip). This could be where St. Vrain's resistance is coming from. Maybe they are hoping you'll re-enroll your child if she can't get services at her new school.
Anyway, good luck