Daughter was recently diagnosed with Autism a few months ago?

Her neurologist said she is significantly delayed, struggles with development, and recommends 25 hrs. of ABA (applied behavioral analysis therapy a week.) The Neurologist said she needed to be in a smaller class with just a few kids in it so she can have more one on one attention. I just recently went to her IEP (individual education plan) meeting at her preschool. I told them she needs more therapy and the school district said they didn't want to overwhelm her with too much therapy right away although the neurologist said she needed more therapy. She also had an official Autism evaluation on April 6, 2011 and they recommended 20 hrs ABA therapy a week and diagnosed her with ASD (autism spectrum disorder). She attends preschool 3 days for 7 1/2 hrs per day altogether. She currently receives 2 1/2 hrs (day) of ABA therapy once a week ... so altogether she currently gets 30 mins of occupational therapy, 1 hour speech therapy + 2 1/2 hours of ABA a week. how can I get her more therapy and why is it sooo hard to get her more therapy? I called her neurologist and asked him to send her school a letter requesting 25hrs of ABA therapy. I have another IEP meeting next week??