Although I'm not sure what that has to do with anything.
No, Down's Syndrome is absolutely not the same thing as Autism and is not caused by vaccines. I do have an autistic son, and my experience and the experience of others have caused us to wonder if there is a link between vaccinations and Autism.
Sadly, I know a bit about this topic. I have a form of Autism... onset occured shortly after a very bad "reaction" to the MMR.