Fetching immunization for patient

I want to fetch lmmunization details for a patient.

I am using below mentioned url. Can anybody tell me where i went wrong?

http://fhir2.healthintersections.com.au/open/Immunization?patient=example

You didn’t go wrong. That’s the correct URL. My server isn’t returning the correct results for that query, and I don’t know why. My development copy does

Hello Sir,
I guess i tried your dev server. I have mentioned below the url i used to hit your dev server and i didnt received back any data as a result. If you know any patient id for whom i can fetch immunization records, can you share those ids with me?
"http://fhir-dev.healthintersections.com.au/open/Immunization?patient=example"

I fixed the indexes on my server, and your original query works fine now.

Thank you so much Sir. I really appreciate your efforts.