KEEP TRYING. I applied three times because they continued to deny me. When I was finally accepted, my mom was so happy she cried. I have a slight processing delay which causes me to take extra long to figure things out. My two hour English exam as a freshman took me 4 hours! ( I got an A!) It just takes me twice as long to read 
I know am intelligent, but my scores were not reflective. with my extended time I received a 1940 on my SAT and was much more satisfied.
My point is, DO NOT GIVE UP. Keep applying, keep pushing, annoy them until you get what your child has worked so hard for.
good luck 